Call blocker for iPhone & Android · made for Nigeria

The calls you don’t want stop at the gate.

BlockAm is a call blocker for iPhone and Android, made for Nigeria. You keep a blacklist of numbers and prefixes, and any call that matches is declined silently: your phone does not ring.

It is free, has no ads, and never reads your contacts or listens to your calls.

Add a prefix instead of a single number. Open the Blacklist tab, tap Block a number, choose Whole prefix and type the first digits, for example 0809 123. Every call from 0809 123 0000 to 0809 123 9999 is then blocked, ten thousand numbers in one go.

On Android a prefix needs at least 3 digits. On iPhone each prefix can cover up to 100,000 numbers, so use at least 6 digits for a Nigerian mobile number, like 0809 12.

Yes, on iOS 16 or later. Apple lets only you switch call blocking on: after installing, open Settings, then Apps, then Phone, then Call Blocking & Identification, and turn on BlockAm. (On older iOS versions it is Settings, then Phone.) It takes about ten seconds and the app notices the moment it is on.

Because of Apple’s rules, iPhone blocks a list of exact numbers, so very short prefixes are too wide to block there. The app tells you when a rule is too wide for iPhone.

Yes, on Android 10 or later. Set BlockAm as your call screening app when the app asks; it is one tap in the system dialog. Android checks every incoming call against your rules in real time, so any prefix of 3 digits or more works, and every blocked call shows up in your History.

No. Only numbers on your blacklist are blocked. Everyone else rings as normal. If you block someone by mistake, remove the rule from the Blacklist tab; you can undo a removal straight away.

No. Your address book is never read, calls are never recorded, transcribed or listened to, and BlockAm does not ask for permission to read your call log. Only the caller’s number is checked, on your phone, against your own list.

No. Every call is checked on your phone, so blocking works offline and with no data. The internet is only used to sign in and to sync your list between your phones.

Your account keeps your blacklist and history safe and in step across your phones. Get a new phone, sign in, and your rules come back. You sign up with your email address; a display name is optional.

Yes. BlockAm is free to download and has no ads. We do not sell or share your data.

In the app, open Settings and tap Delete account & data. It asks for your password, then permanently deletes your account, blacklist and blocked call history from your phone and our servers. If you no longer have the app, email support@blockam.dev from the address on your account.