Comparison

SoundSync vs FORCE CALCULATOR

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Secret performance tools for magicians
  • Prediction and coincidence modes
  • Audience-participation features
  • Interactive tutorials
  • Multiple calculator styles
  • Calculation history
Read full description

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

SoundSync3 screens
FORCE CALCULATOR4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. FORCE CALCULATOR sells 1 one-off in-app purchase. SoundSync asks for nothing beyond the download.

UpkeepUpdate frequency

SoundSync ships an update every 5 weeks, FORCE CALCULATOR every 2 weeks. Both last shipped on October 8, 2026.

Scorecard4 real differences · 6 level
SoundSync versus FORCE CALCULATOR: the parameters behind the verdict, then further details
ParameterSoundSyncFORCE CALCULATOR
PriceFreeFree
Rating—1.0 (1 ratings) — better
Positive reviews63.6% of reviews—
Number of ratings—1 — better
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS9.0 — better18.0
Further details — not scored
Size4 MB2 MB
Age rating4+4+
DeveloperKoichi SatoAkinori Kobayashi

Customer experience

SoundSync

Written reviews11 reviews
Positive63.6%
Neutral9.1%
Negative27.3%

FORCE CALCULATOR

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

SoundSync

No in-app purchases

1 purchases

FORCE CALCULATOR

One-time1
  • Pro$59.99

Questions

Is SoundSync free?
SoundSync is free to download, with no in-app purchases.
Is FORCE CALCULATOR free?
FORCE CALCULATOR is free to download, with in-app purchases available.
Do SoundSync or FORCE CALCULATOR have ads?
Neither SoundSync nor FORCE CALCULATOR shows ads.
Which is updated more often, SoundSync or FORCE CALCULATOR?
SoundSync ships an update every 5 weeks, and FORCE CALCULATOR every 2 weeks. Most recently, SoundSync was updated on October 8, 2026 and FORCE CALCULATOR on October 8, 2026.

Other comparisons