This app lets you convert numbers to their word form up to 75 digits, and it can convert decimals. It lets you change the decimal format and share or copy the output. There is a setting for capitalizing the output. The app could be useful when writing numbers on bank checks.

Get the full version to record your number history and choose between a dark and light theme.

Full Version Link
https://play.google.com/store/apps/details?id=com.grantojanen.numberwordswriter

More Details
Offline: Yes
Lightweight: less than 1MB
Multi-Window Support: Yes
Descriptor: number to words converter