Call Sign Trainer: Morse code

Two training modes:

Challenge mode:
Measure your progress! Choose a speed and a collection and try for a new record. Copy 25 call signs, with only 1 repeat allowed for each!

Practice mode:
Practice copying call signs using any amount of calls and allowed repeats.

Features:
Multiple collections of call signs: CWT, POTA, SOTA, and general.

Choose to keep a constant speed or vary it depending on performance.

Highlights differences between the entry and the actual call.

Customizable tone: choose a single frequency, or random tones. A raised cosine envelope is used to avoid key clicks, the rise and fall times can be changed.

Option to automatically or manually play the next call sign.

Records your all-time highest WPM, and your best accuracy and score for each WPM + callsign group challenge.

You can type '.' to enter '/' for easier entry with the Android keyboard.

Includes an optional workaround for some Bluetooth devices which would otherwise idle and cut off the beginning of audio.