Rejects unwanted phone calls from hidden callers such as telemarketers or spammers. This app is open source and pull requests are most welcome!

https://github.com/mikljohansson/blockade

- Incoming calls with no caller id are silenced and rejected
- Optionally allow calls through on the third attempt
- Requires no more than the minimal permissions to block incoming calls
- Doesn't require permissions for e.g. Internet, SMS, accounts or phone book!