AcidClock always was and always will be 100% free to use and ads-free.

Permissions explained:

"Activity" - used to display goals progress.

"User Profile" - used only to display a resting heart rate.

"Location" - used only for exercises with GPS tracks like running.

"Internet", "Run in background" - used only for the optional Cryptocurrency feature.

"Heart Rate", "Exercise Tracking" - self-explanatory.

Features:

- Tons of customizations including colors, background image, distance units, languages, AM/PM and more.

- Optional cryptocurrency price display: Bitcoin (BTC), Ethereum (ETH) or any other Binance pair.

Tip jars:

Bitcoin: https://live.blockcypher.com/btc/address/15psz93USaEUrkdhmZDH5tmYywvHLJ75zx

Ethereum: https://etherscan.io/address/0x96BDD795aAcAe880AbB9E3f8AA9153BFfd3d026D

Litecoin: https://live.blockcypher.com/ltc/address/LTtfQuChmcwVptF98WZeJbUdGJW3TuNxn3