Comparison

JAX vs TowerDub

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

Head to head
About

JAX

Features
Read full description

Introduction price is available for a short time. We have harnessed Apple’s cutting-edge hardware and native programming frameworks to create an Audio Unit that is truly unparalleled. From floating-point vector registers and Metal Performance Shaders to shared memory between the Audio DSP kernel and the GPU... However β€” since all of this might sound a bit too technical β€” we didn't simply use these technologies as a means to an end; instead, we wrapped them in a musically meaningful and beautiful concept. JAX 'Walking On A Rainbow' is our answer to classic frequency analysis tools β€” featuring a consistently musical implementation designed for real-time processing, imbued with a certain imaginative charm. The songs we composed specifically for this purpose serve to underscore this very concept: β€˜Open your mind and you'll find it's like magic. When you take a step. Oh I'm walking on a rainbow. Walking on a rainbow!’ WE ARE FRONTIERS. You can expect more to cone and - you are welcome to join us. Technical Note: The AudioUnit is smaller than 8 MB and consumes less than 1% of CPU power on an Apple M4 chip. No bloated third-party frameworks were used; this is a native development aligned as closely as possible with Apple's latest hardware (silicon). The manual is available on our website at: https://audio.digitster.com/wp-content/uploads/2026/05/JAX-Walking-On-A-Rainbow.pdf

About

TowerDub

Features
Read full description

TowerDub is an all-in-one groovebox for building reggae riddims and mixing dub, live. Program kick, snare, hats and perc as four independent drum voices, each with its own pattern, velocity and p-locks. Layer in Bass, Chords, Lead and Pads β€” warm, analog-style synths built for roots and dub, playable on a scale keyboard and recordable live with real quantized overdub. Record a vocal chop or a field sample straight into the built-in Sampler. Mix it down through a proper dub desk: send delay and reverb per instrument, sweep a King Tubby–style resonant filter across any bus, throw in siren stabs, and pass your mic straight through the board. Cut instruments in and out live, capture the whole pass with one-tap dub recording, and keep multiple mix versions of the same riddim. No subscriptions β€” just a warm, hand-tuned instrument built for the sound of the desk.

Screenshots

JAX4 screens
TowerDub4 screens

Verdict

The call

JAX and TowerDub are too close to call on the numbers: across 5 compared parameters β€” price, ads, in-app purchases and device support among them β€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

JAX costs $9.99 and TowerDub $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
JAX versus TowerDub: the parameters behind the verdict, then further details
ParameterJAXTowerDub
Price$9.99$9.99
Update frequencyβ€”Weekly
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 β€” better
Further details β€” not scored
Size128 MB2 MB
Age rating4+4+
DeveloperJens GuellAdrien de Quatrebarbes

In-app purchases

None

JAX

No in-app purchases

None

TowerDub

No in-app purchases

Questions

Is JAX free?
JAX costs $9.99, with no in-app purchases.
Is TowerDub free?
TowerDub costs $9.99, with no in-app purchases.
Do JAX or TowerDub have ads?
Neither JAX nor TowerDub shows ads.

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