SoundSync vs FORCE CALCULATOR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SoundSync
This app allows users to program and play up to 48 custom sound effects and music clips. Upload your own audio files and assign them to buttons with various playback modes like one-shot, loop, or gate. Enhance performances with precisely timed audio.
- Program up to 48 custom sounds
- Import own audio files (wave, aiff, mp3, m4a)
- Assign sounds to selectable buttons
- Multiple playback modes (one shot, loop, gate, trigger, pause)
- Volume adjustment for sound balance
- Wireless control with optional receiver
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Just imagine... Anytime, Anywhere, The Power of sound effects at your fingertips! The “sound” of the magic, a door bell, crashing sounds, thunder, a knock on a door, Sound effects are necessary in many performing situations. Up until now, for a sound effect to work, it was necessary to push a button on the touch screen of the iPhone, and you were not easily able to play sounds that you set yourself. Now you can program up to 12 sounds on each of four pages for a total of 48sounds! You can transfer your own wave, aiff, mp3, or m4a files to this iPhone app via iTunes and set it to your own selected sound button. That’s right, "Sound Sync" can set the playing of each sound effect, or piece of music, to the button of your choice. You also have 4 settings of how the sound effect, or music, will be played: “One shot” = only once. +++ “Loop” = playing a phrase repeatedly. +++ “Gate” = plays only while you hold down the button. +++ Trigger = Continues playing the effect one time even if you release the button. +++ Pause = Pauses the sound effect or music until you want it to resume playing. +++ Vol = Volume adjusts the balance of other sound effects and with your Back Ground Music. With the combination of the above settings you can have full control over how all of your sound effects are played! === In addition to the free “Sound Sync” app we also sell the "Sound Sync Receiver" which plugs into your iPhone. This will enable you to control your sound effects wirelessly using either our "Sound Sync Table,” our "Sound Sync Switch," or a combination of both for perfectly timed sounds at any time in your show to enhance all of your routines. Sound effects will now match the performer's own timing perfectly, wirelessly, anytime, anywhere you want! Now there is no need to hold countless meetings with the sound operator. The Sound Sync series will be available from the middle of February, 2011. Your shows will never SOUND the same again! == iPod Touch support of the fourth generation.
FORCE CALCULATOR
This app functions as a standard calculator but includes secret tools for magicians to perform tricks. It offers a free version with basic calculator functions and a one-time purchase for advanced performance features, all while appearing as an ordinary calculator to an audience.
- Secret performance tools for magicians
- Prediction and coincidence modes
- Audience-participation features
- Interactive tutorials
- Multiple calculator styles
- Calculation history
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FORCE CALCULATOR is a calculator app for magicians that looks and works just like a familiar everyday calculator. The standard calculator is free to use. A one-time upgrade to FORCE CALCULATOR Pro unlocks discreet performance tools designed for calculator magic. Pro features: • Performance modes for predictions and impossible coincidences • Memorable routines built around the current date and time • Flexible tools for audience-participation performances • Interactive tutorials presented directly on the calculator screen Additional features: • iOS 18 and iOS 26 calculator styles • Calculation history • Japanese and English interface • Restore purchases on devices using the same Apple Account • No subscription • No advertising, analytics, or tracking To your audience, it remains an ordinary calculator. To the performer, it is a dependable secret tool for creating natural and surprising calculator magic.
Screenshots
Verdict
The clearest difference is in-app purchases: SoundSync at none against FORCE CALCULATOR's 1. SoundSync also leads on iOS requirement (9.0 vs 18.0). FORCE CALCULATOR's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. FORCE CALCULATOR sells 1 one-off in-app purchase. SoundSync asks for nothing beyond the download.
SoundSync ships an update every 5 weeks, FORCE CALCULATOR every 2 weeks. Both last shipped on October 8, 2026.
| Parameter | SoundSync | FORCE CALCULATOR |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 63.6% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Koichi Sato | Akinori Kobayashi |
Customer experience
SoundSync
FORCE CALCULATOR
In-app purchases
SoundSync
No in-app purchases
FORCE CALCULATOR
- Pro$59.99









