Download APK Signal Common Complaints, Feature Highlights & Review

I installed Signal on a spare Android phone on a Tuesday evening, expecting a plain chat app with a privacy badge slapped on top. Three weeks later it had replaced my default messenger for most of my close contacts, and the reasons had very little to do with the badge. The app felt fast, the chats felt quiet, and nothing in the interface begged for my attention. That calm first impression is exactly why Signal keeps winning loyal users, and it is also why the complaints about it sound so specific. People rarely complain that Signal is broken. They complain that it asks for a phone number, that their friends are not on it, or that a feature they liked in another app is missing here.

This review pulls those two sides together. I spent a full month using Signal as my main messenger, moved two group chats over to it, made voice and video calls on mobile data and on weak hotel Wi-Fi, and dug through every privacy setting the app offers. I also read what long-time users grumble about in forums and compared the app head to head with WhatsApp and Telegram, because a messenger is only as useful as the people you can reach on it. What follows covers the common complaints honestly, the features that actually matter in daily use, the setup steps that take five minutes, and a straight verdict for different kinds of users.

If you are weighing a switch, the short version is this: Signal is the strongest choice for private one-to-one chats and small groups, and the weakest choice if your whole social life lives somewhere else. The rest of this article explains why, with enough detail that you can decide before you install anything.

What Signal is and how the Signal Protocol protects chats

Signal is a free, non-profit messaging app for Android, iPhone, and desktop, built by the Signal Foundation. Every one-to-one chat, group chat, voice call, and video call is protected with end-to-end encryption by default, using the Signal Protocol. That protocol is open source, and it has been audited by independent researchers for years. WhatsApp uses the same protocol for its messages, which tells you how widely respected the design is. The difference is that Signal applies it everywhere, including group chats and calls, and collects almost no metadata about who talks to whom. The app stores your messages on your phone, not on Signal servers, and the company says it cannot read your chats even if it wanted to.

That said, encryption alone does not make a messenger good. A messenger has to deliver messages quickly, handle bad connections with grace, and stay out of the way. On my phone, a mid-range Android device from 2023, Signal opened in under a second, messages arrived instantly on mobile data, and voice calls sounded clear even when the connection dropped to one bar. The interface is deliberately plain: a chat list, a compose button, and settings that are easy to find. There is no feed, no stories tab fighting for attention on the home screen, and no ads anywhere. For people who are tired of apps that feel like slot machines, that restraint is a feature in itself.

How the Signal Protocol works in plain language

When you send a message on Signal, your phone scrambles it with a key that only the recipient’s phone holds. The scrambled text travels through Signal servers, which pass it along without being able to read it. Each message gets a fresh key, so even if one key were somehow exposed, it would not open your older messages. That property is called forward secrecy, and it is one of the reasons security researchers praise the design. Group chats work the same way, with the app managing keys for every member behind the scenes. You never have to think about any of this, which is the point. The cryptography stays invisible and the chat window just works.

What safety numbers tell you about a contact

Every contact in Signal has a safety number, a long string of digits that represents the encryption keys for your conversation with that person. If your contact reinstalls the app or switches phones, the safety number changes, and Signal can warn you about it. You can compare safety numbers in person or over another channel by scanning a QR code in the contact’s profile. Most people will never need to do this, but the option matters for journalists, activists, and anyone who wants to be sure nobody is sitting in the middle of a sensitive conversation. I verified one contact this way and the whole check took about twenty seconds.

Who runs Signal and how the non-profit model shapes the app

Signal is run by the Signal Foundation, a non-profit funded by donations and grants, not by advertising or by selling data. That funding model explains a lot about the app. There are no ads, no tracking pixels, no premium tier that holds back basic features, and no pressure to keep you scrolling. It also explains the slower pace of new features compared with Telegram, which ships something new almost every month. Signal adds features carefully, tests them, and sometimes says no to a popular request because it would weaken privacy. Users who want a new toy every week will find that frustrating. Users who want a messenger that does not change under their feet will find it reassuring.

Signal common complaints and whether they still hold up

Search for complaints about Signal and the same themes come up again and again. Some are fair, some are outdated, and a few come from people comparing Signal with apps that play by very different rules. I checked each major complaint against the current version of the app before writing this section, because an old complaint repeated as fact helps nobody.

The phone number requirement and the username fix

The most common complaint is that Signal still asks for a phone number to register. For years, that number was also your visible identity, so anyone who wanted to message you needed your number first. That bothered people who wanted to talk to strangers in a group without handing out personal details. The fix arrived with usernames: you can now pick a username, share that instead of your number, and control whether your number is visible to people who are not in your contacts. Your number is still needed to create an account, and that remains a real barrier for people who cannot or will not share a number with any service. The trade-off is deliberate. A number makes spam and mass abuse much harder, and it makes account recovery possible. If anonymous registration is a hard requirement for you, Signal will disappoint. For most people, usernames close most of the gap.

How to hide your phone number with a username

Open Settings, tap Profile, and create a username. Then go to Settings, tap Privacy, then Phone Number, and set who can see your number to Nobody or to your contacts only. Share the username, not the number, when you invite someone new. The other person can message you without ever seeing your number, and you can change the username later if it leaks somewhere you did not intend. I tested this with a second account and the number stayed hidden through the whole exchange.

Your friends are not on Signal yet

The second complaint is the network effect, and it is the hardest one to argue with. A messenger with perfect privacy and none of your friends on it is a beautiful empty room. WhatsApp and Telegram both have far larger user bases, and in many countries WhatsApp is simply how daily life works. Signal has grown steadily, passing tens of millions of installs, but it still cannot match that reach. In practice, I found a workable middle ground: I moved my closest circle, my family group, and two work contacts to Signal, and kept WhatsApp for everyone else. That split is annoying, and I will not pretend otherwise. Two messengers means two places to check. The honest question is whether the people you talk to about private things are willing to move. For my family, the answer was yes after one conversation about why it mattered.

Backups, SMS removal, and the missing cloud sync

Signal on Android lets you make an encrypted local backup with a passphrase, and you can move that backup to a new phone. On iPhone, there is no equivalent backup file, and moving to a new phone means using the device-to-device transfer. There is no cloud backup like WhatsApp offers, where chats restore from Google Drive or iCloud. Signal refuses to build one because a cloud copy of your messages would create a target worth attacking. That is a principled choice, and it still stings when you lose a phone without a fresh backup. Set a reminder to make a local backup once a month if you are on Android, and keep the passphrase in a password manager, not in a note on the same phone. Signal also dropped SMS support on Android in 2023, so it no longer doubles as a texting app. If you liked having SMS and Signal in one place, that change still hurts, and there is no setting that brings it back.

How to make an encrypted backup on Android

Go to Settings, tap Chats, then Chat backups, and turn backups on. Signal will show you a 30-digit passphrase. Write it down somewhere safe and separate from your phone, then tap to create the backup. Copy the backup file off the phone to a computer or a drive you control. To restore, install Signal on the new phone, choose to restore a backup, enter the passphrase, and point the app at the file. The restore took about four minutes for two years of chats on my test device, including media.

Calls, video limits, and small rough edges

Group calls on Signal support up to 50 people, which is plenty for a family call but far below what some work tools offer. Video calls are clear one-to-one, and group video works well up to a handful of participants, though the layout gets crowded fast on a small screen. A few users report delayed notifications on some Android phones, usually because aggressive battery optimisation kills the app in the background. The fix is to exempt Signal from battery optimisation in your phone settings, and to check that notifications are allowed after a system update. I hit a delayed notification once on a phone with a strict battery saver, and the exemption solved it the same day.

Signal feature highlights worth knowing before you install

Signal’s feature list looks short next to Telegram, and that is by design. Each feature below is one I actually used during my month of testing, not a line copied from a marketing page. If a feature sounds useful, it probably is. If it sounds like a gimmick, Signal probably does not have it, and that is fine.

Disappearing messages and view-once media

Disappearing messages are the feature I reached for most. You can set a timer per conversation, from 5 seconds to 4 weeks, after which messages vanish from both phones. Group admins can set a default timer for the whole group, which is handy for a chat that shares sensitive photos. View-once media works the same way for a single photo or video: the recipient opens it once, then it is gone, and they cannot save it from inside the app. Screenshots are still possible on most phones, so this is not a guarantee against a determined person, but it stops casual forwarding and keeps old media from piling up. I set a one-week timer on my family group and the chat stayed tidy without anyone having to delete anything by hand.

Usernames, Signal Stories, and Note to Self

Usernames let you connect without sharing a phone number, as covered above, and they are the single biggest change to Signal in recent years. Signal Stories let you post a photo or short video that vanishes after 24 hours, visible only to people you choose. Stories here feel quieter than on other apps, with no ads, no view counts pushed in your face, and no algorithm deciding who sees what. Note to Self is a private chat with yourself that syncs across your linked devices, and I used it more than I expected: shopping lists, links to read later, photos I wanted on my desktop. It replaced a separate notes app for quick captures, and the sync was instant every time I tested it.

Groups, reactions, stickers, and voice and video calls

Signal groups support up to 1,000 members, with admin controls, mentions, group links, and disappearing message timers. Reactions let you answer a message with an emoji without adding a new bubble to the chat, and stickers, including animated packs, work well in one-to-one chats. Voice calls use the same encryption as messages, and you can relay calls through Signal servers so your IP address stays hidden from the other person. Video calls support screen sharing on desktop, which covered the one work call I needed during testing. None of this is flashy. All of it works, and the call quality held up better than I expected on a weak connection, with audio staying clear while video dropped to a lower resolution instead of freezing.

Relay calls to hide your IP address

Go to Settings, tap Privacy, then Advanced, and turn on “Always relay calls”. Signal will route your calls through its servers, so the person you call never sees your IP address. Call quality may drop slightly, because the route is longer, but on my tests the difference was small on a decent connection. Turn this on if you call people you do not know well, or if you simply prefer not to share network details with anyone.

Signal vs WhatsApp vs Telegram comparison table

A comparison only helps if it measures the same things on every side, so the table below sticks to the criteria that decide a daily messenger: encryption, identity, backups, group size, and cost. All three apps are free. The differences sit in what each one does with your data and how many of your contacts already use it.

Signal vs WhatsApp: privacy against reach

WhatsApp wins on reach in most countries, and that single fact decides the choice for many people. Its encryption is strong, its calls are reliable, and its backup system is far more convenient than Signal’s. The trade-off is ownership: WhatsApp belongs to Meta, it collects more metadata, and its business features keep growing. Signal collects almost nothing, answers to a non-profit board, and keeps your messages off its servers. If your contacts are already on WhatsApp and will not move, use WhatsApp and turn on encrypted backups with a strong password. If your close circle will switch, Signal gives you the same daily experience with a smaller data footprint. If you enjoy exploring new tools and finding fresh ways to spend time online then Telegram X is a natural next app to try and it offers a different angle on the same kind of activity. When you want a change of pace then OK covers that need neatly. And for a third option Bigo Live is worth a look as well.

Signal vs Telegram: security against features

Telegram wins on features by a wide margin: huge groups, channels, bots, cloud sync across every device, and a new feature every few weeks. Its regular cloud chats are not end-to-end encrypted by default, which is the catch that matters most. Secret Chats are encrypted, but they do not sync, they do not support groups, and most people never turn them on. Signal encrypts everything by default and never asks you to choose a special mode for a private conversation. Pick Telegram if you run a large community or need cloud access from many devices. Pick Signal if you want the private mode to be the only mode, with no settings to get wrong.

How to set up Signal in five minutes

Setup is short, and the order matters. Do the privacy steps during setup, not a month later, because a username and a registration lock are much easier to set while you are already in the settings screens.

Step 1: install, register, and set a profile name

Install Signal, open it, and enter your phone number. Type the six-digit code that arrives by text, then choose a profile name and an optional photo. Use a name your contacts will recognise, because this is what appears in their chat list. Signal will ask for permission to access your contacts so it can show you who is already on the app. You can say no and add contacts by hand instead. The app works either way, and declining contact access is the more private choice if you do not mind typing numbers yourself.

Step 2: create a username and a PIN

Create a username in your profile settings, then set a Signal PIN. The PIN is not your phone lock code. It protects your account settings, supports registration lock, and helps you recover your profile and contacts if you reinstall. Pick a PIN you can remember, write it in your password manager, and turn on registration lock in Settings, then Account, then Registration Lock. With that on, nobody can register your number on a new phone without the PIN, even if they intercept your text messages. That single setting closes the most realistic attack against a messenger account, and it takes less than a minute to enable.

What to check after the first day

After a day of use, check three things. First, open a chat and confirm the safety number warning is off for contacts you trust. Second, send yourself a test message in Note to Self and confirm it appears on your desktop app if you use one. Third, make one voice call and check the call quality on your usual connection. If a call sounds rough, turn on relay calls and test again. These three checks catch most setup problems early, while they are still easy to fix.

Signal pros and cons from a month of daily use

A fair review gives both sides room. Signal earned its place on my phone, and it still has rough edges I notice every week. The lists below come from that month, not from a feature sheet.

Pros: where Signal earns its keep

• End-to-end encryption everywhere by default — chats, groups, calls, and stories are protected without you choosing a special mode.
• Almost no metadata collection, no ads, and no tracking, backed by a non-profit structure that has no reason to change that.
• Disappearing messages and view-once media keep sensitive chats tidy without manual cleanup.
• Call quality stays clear on weak connections, and relay calls hide your IP address from the other side.
• Registration lock and safety numbers give you practical protection against account takeover and interception.
• The interface stays calm and fast, with no feed, no ads, and no features competing for your attention.

Cons: where Signal still strains

• Your contacts may not be on Signal, so you may end up running two messengers for a while.
• No cloud backup means a lost phone can mean lost chats unless you kept a local backup.
• File sharing caps at 100 MB per file, which is lower than WhatsApp and Telegram.
• Fewer fun extras: no huge sticker economy, no channels, no bots, and slower arrival of new features.
• Registration still needs a phone number, which rules it out for people who need fully anonymous sign-up.

The trade-off in one sentence

Signal trades reach and convenience for privacy and calm, and that trade is worth it for private conversations, while it feels like a cost for everything else. I keep WhatsApp installed for the contacts who will not move, and I keep Signal as the place where the conversations I care about most actually happen.

Privacy settings worth changing in your first week

Signal is private out of the box, and five minutes in the settings makes it stronger. These are the changes I made, in the order I made them, with the reason for each one.

Screen lock, incognito keyboard, and read receipts

Turn on screen lock in Settings, then Privacy, so the app asks for your fingerprint or phone PIN before it opens. This matters if you hand your phone to someone, or if it is ever lost. Turn on the incognito keyboard option in the same screen, so your keyboard does not learn the words you type in Signal. Then decide about read receipts and typing indicators. Turning read receipts off means others will not see when you read their messages, and you will not see when they read yours. I left them on for close contacts and off in my head for everyone else, which is to say I left them on, because the social cost of hiding them was higher than the privacy gain for my circle. Your circle may differ, and the setting takes ten seconds either way.

Set a default disappearing message timer for new chats

In Settings, then Privacy, then Disappearing messages, set a default timer for new conversations. I chose one week, which is long enough to find an address someone sent on Tuesday, and short enough that old chats do not pile up for years. You can change the timer per chat at any time, so the default is only a starting point. Group admins can set a timer for the whole group, which I recommend for any group that shares photos of children or travel plans.

Who Signal is for and the verdict per use case

Signal fits some people perfectly and others not at all, and the honest answer depends on who you talk to and what you talk about. The verdicts below are per use case, because a single score would hide the real decision.

Who will enjoy Signal most

People who value private conversation will enjoy Signal most, especially journalists, doctors, lawyers, activists, and anyone who discusses sensitive topics at work. Families who want a calm group chat without ads will like it too, once everyone installs it. People who are tired of feeds and attention tricks will appreciate an app that opens straight to the chat list and stays there. Beginners will feel welcome, because the app explains itself through use and the core flow is just open, type, send. Curious explorers will find enough depth in the privacy settings to stay interested once the basics feel comfortable.

Verdict per use case

For private one-to-one chats, Signal is the best choice I tested, with the strongest default protection and the calmest interface. For family groups, it is a strong choice once everyone agrees to install it, and the disappearing message timer keeps the group tidy. For large public communities, Telegram is the better tool, because Signal groups top out at 1,000 members and have no channels. For reaching the most people with the least friction, WhatsApp still wins, and using its encrypted backups is the right way to use it. For work calls with screen sharing, Signal handles small meetings well, but a dedicated work tool will serve a big team better. My own setup after a month is Signal for the people closest to me, WhatsApp for everyone else, and no regrets about either half of that split.

Signal frequently asked questions

Is Signal really free and how does it pay for itself?

Yes, Signal is free, with no ads, no premium tier, and no paid features held back. The Signal Foundation is a non-profit funded by donations and grants, and the app asks for donations inside the settings rather than charging for features. That funding model is why the app has no ads and no reason to collect your data. If you rely on Signal, a small donation keeps that model alive, though the app never requires one.

Does Signal work without a phone number?

No, Signal still needs a phone number to create an account, and that number is verified by text message during registration. Usernames let you hide the number from other users, and you can set who sees it to nobody or to contacts only. The number itself is still held by Signal for registration, which is a deal-breaker for people who need fully anonymous sign-up, and a reasonable trade for people who want spam protection and account recovery.

Can I use Signal on my computer as well as my phone?

Yes, Signal has a desktop app for Windows, Mac, and Linux that links to your phone by scanning a QR code. Chats sync between phone and desktop, calls work from the desktop, and you can send files from your computer. The desktop app needs your phone to stay registered, and some features, like stories, are limited on desktop. I used the desktop app for long typing sessions and it stayed in sync without any trouble. You can read the details and get the desktop app from the official site at Signal official site.

What happens to my chats if I lose my phone?

On Android, you can restore from an encrypted local backup if you made one and kept the passphrase safe. Without a backup, your message history is gone, because Signal does not keep a cloud copy of your chats. On iPhone, use the device-to-device transfer when you get a new phone. Your contacts and groups can be restored with your PIN in many cases, but the message text itself depends on a backup or a transfer. Make a backup once a month and keep the passphrase in a password manager, and this risk drops to almost nothing.

Final verdict on Signal after a month of real use

No app is perfect, and Signal is no exception, yet its strengths outweigh its limits for the conversations that matter most. It is fast, calm, private by default, and honest about what it will not do. The complaints about reach, backups, and the phone number are real, and I felt each of them during my month of testing. The features that matter, encryption everywhere, disappearing messages, usernames, registration lock, and clear calls, all worked without fuss on ordinary days, which is the only test that counts.

Try Signal for a full week before you judge it, with your closest circle, a disappearing message timer of one week, and registration lock turned on. A week of short daily sessions shows the real character of the app better than any review can. When you are ready to give Signal a proper try then use the link below and it takes you straight to the Signal page on AndroidRU where you can get it.

Click here to download the Signal app

A similar app is worth a quick look too. Click here to download the Telegram X app. As a second option Click here to download the OK app.

The lasting lesson from Signal is that a calm tool used steadily beats a powerful tool that never gets opened, and a private chat you can trust beats a crowded one you cannot.