Comparison

ThermVoltGe vs Play Jazz

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

Head to head
About

ThermVoltGe

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ThermVoltGe is a character-focused germanium distortion processor for iPhone and iPad. Use it as a standalone audio app or insert the included AUv3 effect in a compatible host such as GarageBand. Its nonlinear core is built around an OA91-style germanium-diode architecture. A low forward-voltage threshold, asymmetric conduction, temperature dependency, battery sag, and supply-voltage interaction create early compression and a soft, rounded clipping response. FEATURES - OA91-style germanium diode clipping - Temperature-dependent nonlinear response - Battery sag and supply-voltage control - Instrument and line input modes - Boost stage - Adjustable gain, high-pass filter, tone, drive, and output - 2x and 4x oversampling modes - Standalone iOS/iPadOS app - AUv3 audio effect for compatible hosts TRY BEFORE UNLOCKING The app provides 10 minutes of full-featured active use. Demo time advances only while the standalone app or AUv3 effect is actively being used. After the allowance is used, audio processing is disabled for 24 hours. A one-time, non-consumable In-App Purchase unlocks unlimited use in both the standalone app and AUv3 extension. Restore Purchases is available in the standalone app. Customers whose verified original app version is 1.0.2 or earlier retain full access automatically without an additional purchase. ThermVoltGe is designed for guitar, bass, synthesizers, keyboards, and other sources that benefit from compressed, harmonically rich germanium drive.

About

Play Jazz

Features
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Play Jazz turns your iPhone or iPad into an approachable jazz instrument. Choose a sound, start a backing groove, and play notes that fit the current harmony. Features: - Scale-safe keyboard with Home Scale and Chord Scale modes - Jazz chord progressions and backing grooves - Piano, Hammond organ, guitar, brass, and other instrument sounds - Sustain controls and touch-friendly slide playing - Tempo, mix, and three-band EQ controls - No account required Play freely, explore jazz harmony, and build confidence without worrying about wrong notes. The app is free and supported by non-personalized banner advertising.

Screenshots

ThermVoltGe2 screens
Play Jazz4 screens

Verdict

The call

The clearest difference is in-app purchases: Play Jazz at none against ThermVoltGe's 1. Play Jazz also leads on update cadence (every 5 days vs every 2 months) and iOS requirement (13.0 vs 16.0). ThermVoltGe's advantage is ads (none vs shown). On price and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. ThermVoltGe sells 1 one-off in-app purchase. Play Jazz asks for nothing beyond the download.

UpkeepUpdate frequency

ThermVoltGe ships an update every 2 months, Play Jazz every 5 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences ยท 2 level
ThermVoltGe versus Play Jazz: the parameters behind the verdict, then further details
ParameterThermVoltGePlay Jazz
PriceFreeFree
Update frequencyEvery 2 monthsEvery 5 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS16.013.0 โ€” better
Further details โ€” not scored
Size28 MB22 MB
Age rating4+4+
DeveloperShoma KondoMateusz Smarduch

In-app purchases

1 purchases

ThermVoltGe

One-time1
  • ThermVoltGe Full Version$4.99
None

Play Jazz

No in-app purchases

Questions

Is ThermVoltGe free?
ThermVoltGe is free to download, with in-app purchases available.
Is Play Jazz free?
Play Jazz is free to download, with no in-app purchases.
Do ThermVoltGe or Play Jazz have ads?
Play Jazz shows ads; ThermVoltGe does not.
Which is updated more often, ThermVoltGe or Play Jazz?
ThermVoltGe ships an update every 2 months, and Play Jazz every 5 days. Most recently, ThermVoltGe was updated on October 25, 2026 and Play Jazz on October 31, 2026.

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