Comparison

Uber Synth vs TerribleSync

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

Head to head
About

Uber Synth

This app offers a polyphonic multi-timbral FM synthesizer for iOS devices. It features a triple-oscillator sound engine with five distinct multi-timbral options for creating evolving and complex soundscapes. Supports Audiobus for integration with other music apps.

Highlights
  • Polyphonic multi-timbral FM synthesizer
  • Triple-oscillator cross-modulated FM engine
  • Five multi-timbral options
  • Sound map and sound palettes
  • Evolving sound generation
  • Audiobus support
Features
Read full description

Uber Synth is a polyphonic multi-timbral frequency modulated (FM) synthesizer that runs on any iOS device. The underlying sound engine is based on the triple-oscillator cross-modulated FM synthesizer first introduced in our xMod app. Uber Synth provides five multi-timbral options: 1) Mix the sounds of any two sound patches, 2) combine patches using the sound map, 3) Generate specified as well as randomized sound palettes across the keyboard, 4) Specify a region in sound space centered on a sound and move a point by a variable randomized amount within the region each time you play a note to create an evolving mix of the center sound and the sound nearest the point. 5) Do the same as above moving the point automatically at a specified rate. Supports Audiobus.

About

TerribleSync

Control the tempo of music hardware like synthesizers and drum machines using your iPhone or iPad. Features include tap tempo, precise dial adjustment, and buttons for performance effects. Requires a 3.5mm audio cable for connection.

Highlights
  • Tap tempo
  • Rotary tempo dial
  • Pause/mute button
  • Performance effect buttons
  • Clear interface
  • Open source project
Features
Read full description

Use your iPhone or iPad to control the tempo of impulse-sync-enabled synthesizers, drum machines, and other music hardware. Features: • Tap tempo • Supports 20.0 - 999.0+ BPM • Rotary tempo dial for precise, tactile tempo adjustment • Pause/mute button • ?, !, and :fire: buttons to introduce character and chaos into your performance • Clear, simple interface designed to be easy to use in a stage/performance setting This app works with any instrument you own that takes voltage impulses as a tempo control, such as: • KORG SQ-1, Volca, Monotribe, etc. • Teenage Engineering Pocket Operator • Moog MOTHER-32 (choose the "single clock advance" setting on the instrument) This project is open source. Try building it yourself at https://github.com/terribleben/terrible-sync or contact twitter.com/terribleben with feedback! Notes: • 3.5mm audio cable is required to connect your iPhone or iPad to your sync-enabled instruments. • If the instrument isn't responding, you may need to increase the iPhone's volume. • This software is not produced by, endorsed by, or affiliated with KORG, Teenage Engineering, Moog Music, or other instrument manufacturers.

Screenshots

Uber Synth4 screens
TerribleSync1 screens

Verdict

The call

The clearest difference is price: TerribleSync at Free against Uber Synth's $3.99. TerribleSync also leads on rating (4.0 vs 2.0) and review sentiment (83% vs 50%). Uber Synth's advantage is update cadence (every 3 months vs every 35 months). On ads, in-app purchases 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

TerribleSync is free to download; Uber Synth costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

TerribleSync holds the better App Store score, 4.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 50% of Uber Synth's written reviews are positive against 83% of TerribleSync's.

UpkeepUpdate frequency

Uber Synth ships an update every 3 months, TerribleSync every 35 months. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

Scorecard7 real differences · 3 level
Uber Synth versus TerribleSync: the parameters behind the verdict, then further details
ParameterUber SynthTerribleSync
Price$3.99Free — better
Rating2.0 (1 ratings)4.0 (4 ratings) — better
Positive reviews50.0% of reviews83.3% of reviews — better
Number of ratings14 — better
Update frequencyEvery 3 months — betterEvery 35 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size7 MB1 MB
Age rating4+4+
DeveloperMark CarlottoBenjamin Roth

Customer experience

Uber Synth

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews8 reviews
Positive50.0%
Neutral12.5%
Negative37.5%

TerribleSync

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

Uber Synth

No in-app purchases

None

TerribleSync

No in-app purchases

Questions

Is Uber Synth free?
Uber Synth costs $3.99, with no in-app purchases.
Is TerribleSync free?
TerribleSync is free to download, with no in-app purchases.
Which has better reviews, Uber Synth or TerribleSync?
TerribleSync is rated higher. Uber Synth averages 2.0 out of 5 from 1 ratings, while TerribleSync averages 4.0 from 4 ratings.
Do Uber Synth or TerribleSync have ads?
Neither Uber Synth nor TerribleSync shows ads.
Which is updated more often, Uber Synth or TerribleSync?
Uber Synth ships an update every 3 months, and TerribleSync every 35 months. Most recently, Uber Synth was updated on October 15, 2026 and TerribleSync on October 2, 2026.

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