Keep the texts.
Lose the calls.

No. Do Not Disturb silences your phone — it does not stop the call. The call still connects on the network, your caller still hears a ringtone for around thirty seconds, and it still lands in voicemail. Nothing about the call is prevented; only your ringer is. No Calls works at a different layer: it uses Android's call screening service to reject the call outright, so it never rings at either end.

Yes, and this is the whole point. No Calls only ever acts on incoming voice calls. SMS, MMS, RCS, mobile data, Wi-Fi and every app on your phone are completely untouched. Your messages arrive exactly as they always have, with the same notifications, while quiet mode is on.

No. Airplane mode disconnects you from the network entirely, so you lose texts, data and everything else along with the calls. No Calls leaves you fully connected and removes one thing: the ringing. You stay reachable by message while being unreachable by phone.

The call ends immediately rather than ringing out. On most carriers the caller is sent straight to voicemail, and on some they hear a short busy tone. Either way they are not left listening to thirty seconds of ringing first, which is what happens with Do Not Disturb.

Yes. Add anyone to your "Always gets through" list and their calls ring normally while everyone else is rejected. It is built for the short list that actually matters — family, the school, your boss, a carer. Adding someone uses Android's own contact picker, which hands the app the single entry you chose and nothing else.

No. Everything happens on your device. Incoming numbers are checked locally and never transmitted, your rejected-call history lives in a local database you can clear at any time, and your contact list is never read, indexed or uploaded. The app works with no internet connection at all, which is the simplest proof that nothing is being sent anywhere.

For one narrow technical reason that is not the one you would expect. From Android 12 onward, Android only hands a call to a screening app if that app holds contacts permission — otherwise calls from people in your address book bypass screening entirely and ring through. The permission changes which calls Android passes over; it does not change what the app looks at. Decline it and everything else still works, but calls from saved contacts will ring.

Because they were rejected before your phone app ever saw them. Android's screening response tells the system to skip both the notification and the native call log, which is what stops your phone lighting up. That is exactly why No Calls keeps its own list: open it whenever you like and see every call you missed, with a weekly tally of the time it gave back.

Yes, completely. There is no account, no server and no sync. Call screening is handled entirely on your device by Android itself, so No Calls works in airplane mode, on a plane, in a basement, or on a phone with no SIM data at all.

Calls simply come through again. Nothing breaks, nothing is deleted, and your texts were never affected either way. The free trial runs for three quiet days with no account and no card, and if you later cancel a subscription the app just stops rejecting calls.

No, and there cannot be one that works this way. iOS gives apps no equivalent of Android's CallScreeningService, so no third-party app on iPhone can reject an incoming call before it rings. No Calls is Android only, and that is a platform limit rather than a roadmap item.