Comparison

TerribleSync vs JHG Rhythm Toolkit

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

Head to head
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.

About

JHG Rhythm Toolkit

Features
Read full description

Introducing the JHG Rhythm Toolkit – an app that combines three powerful tools for a complete musical experience. JHG Metronome: Classic aesthetics meet digital convenience. A powerful metronome with various time signatures, sounds and BPMs. Ideal for both beginners and advanced musicians. JHG Tap Tempo: Tap along with the beat to get the exact tempo (BPM) of a song. Use it for practice, performance, instrument synchronization, or as a reference point for song tempo. JHG Speed Trainer: Perfect for mastering challenging licks, riffs, or scales. Set your starting BPM, define repetitions, interval increments, and target speed. Let the JHG Speed Trainer guide you, steadily enhancing your technical skills. Embrace metronome practice, measure song tempos, and build speed and proficiency – all within the JHG Rhythm Toolkit. Explore terms of use at https://www.jamieharrisonguitar.com/terms-of-use.

Screenshots

TerribleSync1 screens
JHG Rhythm Toolkit4 screens

Verdict

The call

The clearest difference is in-app purchases: TerribleSync at none against JHG Rhythm Toolkit's 3. TerribleSync also leads on iOS requirement (12.0 vs 15.0). JHG Rhythm Toolkit's advantage is update cadence (monthly vs every 35 months). 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. JHG Rhythm Toolkit sells 3 in-app purchases, starting at $0.99 per month. TerribleSync asks for nothing beyond the download.

UpkeepUpdate frequency

TerribleSync ships an update every 35 months, JHG Rhythm Toolkit monthly. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 7 level
TerribleSync versus JHG Rhythm Toolkit: the parameters behind the verdict, then further details
ParameterTerribleSyncJHG Rhythm Toolkit
PriceFreeFree
Rating4.0 (4 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings4 — better—
Update frequencyEvery 35 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size1 MB37 MB
Age rating4+17+
DeveloperBenjamin RothJamie Harrison Media Ltd.

In-app purchases

None

TerribleSync

No in-app purchases

3 purchases

JHG Rhythm Toolkit

Subscriptions3
  • Monthly Subscription$0.991 Month
  • 7 Days Free Trial7 Days trial$8.991 Year
  • Annual Subscription$8.991 Year

Questions

Is TerribleSync free?
TerribleSync is free to download, with no in-app purchases.
Is JHG Rhythm Toolkit free?
JHG Rhythm Toolkit is free to download, with in-app purchases available.
Do TerribleSync or JHG Rhythm Toolkit have ads?
Neither TerribleSync nor JHG Rhythm Toolkit shows ads.
Which is updated more often, TerribleSync or JHG Rhythm Toolkit?
TerribleSync ships an update every 35 months, and JHG Rhythm Toolkit monthly. Most recently, TerribleSync was updated on October 24, 2026 and JHG Rhythm Toolkit on October 16, 2026.

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