Sample Metronome has perfect timing and you can use your own clip as the tick.

This metronome is extremely precise. It uses the Android module PF-Seq, which is precise and accurate TO THE FRAME (44,100 frames per second).

Sample Metronome lets you use your own "sample" (audio clip) for the metronome tick. The app comes with a few samples to chose from, but you can copy your own audio files into the app's directory (Sample_Metronome in the device Internal Storage), in order to use them.

Being able to change the tempo, while the metronome is playing, and change the sample selected, while the metronome is playing, is very convenient. The dial control also provides makes easy to use. You can use the dial to arrive at the tempo, or you can type in a specific tempo, with decimal precision that probably goes way beyond what anyone would need.

The app can run in the background. You can acually listen with headphones and open a separate recording app to record a track, while the metronome is playing.

Features:

• Most audio filetypes are supported.

• App comes with 5 audio clips (aka samples) to choose from

• Easily add samples

• Change BPM while playing with convenient dial

• Option to manually enter BPM

• Open-source

• Ad free

• BPM has 6 decimal place precision

• Tick rate can be set to once per beat, twice per beat, 4 times per beat, or once per 2 beats

• Metronome can play from the background and shouldn't get shut down by Android system.

• Keeps going if screen is asleep

• Supports many audio filetypes including FLAC, MP3, WAV, M4A

• Samples are kept in a directory that is marked such that Android music player apps will not include the audio files as though they were songs (.nomedia file)