Call Blocker can reject unwanted calls automatically. If you want to reject calls from anyone, you can just add the number to blacklist and let Call Blocker do the job.
The app is too light, has zero impact on battery unlike other block apps.
✔️ Block calls using blacklist.
✔️ Auto answer with SMS.
✔️ Use "Whitelist" to prevent block of certain people.
✔️ "Log" of blocking.
✔️ Robust call blocker