Showing 1–20 of 1,000 ranked alternatives.
Steve Glenner
Calculate with a slide rule
Perform multiplication, division, logarithmic, and trigonometric calculations using a slide rule interface. Adjust scales for precise measurements. Manual operation requires sliding components to compute results.
Ben Comber
Practice with interactive lessons
Handwriting through interactive lessons and create custom worksheets for practice. Practice Spencerian script with guided exercises. Add ornamental flourishes and bounce lettering to refine penmanship. Syncs with Apple Pencil for precise writing.
Chordify BV
Play songs, learn chords, save tracks
Learn to play songs with accurate chord charts for any track. View animated guitar, ukulele, and piano chords. Search a vast song catalog and sync your library across devices. Integrate with YouTube for instant access to music.
Russell Shannon
DoD and NASA TRL quick reference.
The app provides quick reference for Department of Defense and NASA Technology Readiness Levels. It includes definitions, descriptions, and supporting information for each TRL.
kim kihyun
Charge devices with portable power
Manage and monitor health with real-time voltage and temperature readings. Track charge cycles and capacity levels. Set low- alerts and schedule charging sessions. Sync data across devices for remote monitoring.
NativeCamp Inc.
Take lessons anytime, anywhere
Take unlimited lessons anytime, 24/7. Start lessons immediately without advance booking. Practice repetitive learning with endless lesson options. Track progress through consistent practice to improve English conversation skills.
NatureGuides Ltd.
Explore science and technology history interactively.
The app presents priceless objects from the Science Museum in London, allowing users to study, rotate, and operate scientific inventions. It features original history written by curators, historic photographs, archive film, and video.
Bryan Duggan
Identify tunes by playing melodies
The app searches a database of over 22,000 tunes by playing a melody. Matching tunes are downloaded for viewing, editing, and playback.
Filimundus AB
Solve puzzles and compete in VS mode
Explore puzzles and with interactive gameplay. Solve challenges to build and test contraptions. Compete in VS mode against friends or the clock. Unlock new and progress through levels. Track achievements and compare scores.
Erudite Apps LLC
Fold , punch holes, solve puzzles
Solve visual puzzles by folding and punching . Predict hole placements after folding. Progress through 1,885 levels with increasing difficulty. Improve spatial reasoning, short-term memory, and logic skills.
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.