Company Bjoern Gumboldt created these great apps:
Mental Cal - Brain Training, TicTacMoji - Play Tic Tac Toe with Emoji, Speffz Trainer - Improve Your BLD Solve Times, TapMoji - Tap The Emoji, Speffz Simon - Memorize The Color Sequence, MemoCube - Memorize the Magic Cube, ByteMe - 8 Bit Game, RGB Master - Color Mixing Puzzle, ByteMe2 - 8 Bit Game, Spoken Numbers, Learn French - Calendar 2019, Learn Italian - Calendar 2019, Learn Portuguese - Calendar, Learn Romanian - Calendar 2019, Learn German - Calendar, Learn Spanish - Calendar 2019, Learn Danish - Calendar 2019, Learn Dutch - Calendar, Learn Swedish - Calendar, Learn Norwegian - Calendar, Learn Czech - Calendar 2019, Learn Polish - Calendar, Learn Russian - Calendar 2019, Learn Greek - Calendar 2020, Learn Chinese - Calendar, Learn Korean - Calendar 2020, Learn Slovak - Calendar 2019, Learn Japanese - Calendar 2020, Learn Hungarian - Calendar, Learn Thai - Calendar 2020, Learn Hindi - Calendar 2020, Learn Arabic - Calendar 2020, Learn Indonesian - Calendar, Learn Hebrew - Calendar 2020, Learn Turkish - Calendar 2020, and others..