I just did a rough whatsapp text to speech message using a tasker script log and monitor battery power usage. I had it rounding to 4 decimal places of a percentage and saw 0 percent change. Take my rather unscientific test as you will. I think the trick is to not do it continuously and leverage location and volume detection events. I think a few years ago this may have been a lot more heavy on the battery but anything made within the last 2-3 years will not have much of a problem.
I just did a rough whatsapp text to speech message using a tasker script log and monitor battery power usage. I had it rounding to 4 decimal places of a percentage and saw 0 percent change. Take my rather unscientific test as you will. I think the trick is to not do it continuously and leverage location and volume detection events. I think a few years ago this may have been a lot more heavy on the battery but anything made within the last 2-3 years will not have much of a problem.
Whatsapp is sending your audio to the cloud to handle transcription. This is not an accurate test because it is not an on-device process.
No, my keyboard is doing it locally. Futo.