VADrumSM vs Solderbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VADrumSM
This app is a virtual analog drum machine with a step sequencer. It offers 21 synthesized drum voices and flexible pad controls. It integrates with other music apps via AUv3 and Ableton Link.
- Virtual analog drum synthesizer
- 16-step sequencer
- AUv3 Audio Unit Extensions support
- Ableton Link synchronization
- XY pad controllers
- Parameter automation
- 17 output buses
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VADrumSM is a standalone mobile drum machine featuring a virtual analog drum synthesizer and a step sequencer. The virtual analog drum synthesizer supports AUv3 Audio Unit Extensions, which allows users to use the drum synthesizer inside of AUv3 hosts, such as Apple’s GarageBand®. The sequencer supports Ableton Link. You can synchronize the sequencer to Link-enabled apps and devices. Drum Synthesizer The drum synthesizer is inspired by the iconic analog drum machines of the 1980’s and features 21 drum voices. Sounds of the each drum voices are synthesized in real time by using component level modeling. Pads Pads function as XY controllers, XY controllers with trigger, or drum pads. When using pads as XY controllers, destination can be selected from tone/decay, level or pitch. Step Sequencer The step sequencer is designed to be intuitive and easy to program drum sequences. It is a 16 step sequencer and it has 3 accent level for the each step. Double hit mode allows to program two 32nd notes instead of the one 16th note. There are 4 patterns and can be chained to create 4 bar loop. There are 6 variations of swing, which can be applied in real time. Parameter Automation All XY parameters (tone, level and pitch) and voice switches can be automated, that gives a whole new sonic possibility. MIxer 17 output buses, including a mix output and 16 instrument outputs of Drum Synthesizer can be routed to main output and 4 aux mixers. AUv3 effects can be inserted to each channels. Sum of the 4 aux mixers outputs can be routed to Audiobus’s second output port. FEATURES Drum Synthesizer - 21 analog modeling drum synthesizers, including 2 bass drums, 2 snare drums, 2 sets of low, mid and high toms, low, mid and high congas, rim shot, claves, hand clap, maracas, closed and open hi-hats, cymbal and cowbell. - 3 Layers of 16 XY pad controls (Tone, Level, Pitch) - Drum Pads Mode (Pad) - Trigger Mode (On / Off) - MIDI input (mid note events only) - Output mix signal and all instruments signal - Support Audio Unit Extensions (AUv3) Step Sequencer - 16 step sequencer - Variable Pattern Length - Parameter Automation - Swing: 6 variations - Accent: 3 level - Double hit: on / off - Pattern: 4 patterns - Pattern Length: 1 bar - Loop length: 1 bar or 4 bar - Note length: 16th or 32nd - Record quantization: 16th - Chain mode: on / off - Tempo: 20 BPM - 999 BPM - Support Ableton Link * Ableton Link requires Wi-Fi connections. Others -Support Audiobus (main output and aux output) -Built in User Guide
Solderbox
This app is a compact, semi-modular synthesizer designed for generative music creation. It offers a comprehensive set of modular functions, aiming for analog-like sound and behavior with unique digital effects and an 'Instability Engine' for organic fluctuations.
- Generative synthesis tools
- Analog-like sound emulation
- Instability Engine for organic fluctuations
- Audio Unit (AUv3) compatibility
- Built-in Pulsequencer melody generator
- Multiple filter modes
- Stackable patch cables
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Solderbox is a compact semimodular synthesizer, made in collaboration with Jakob Haq. It is heavily based on Jakob's own modular rack design (which features a lot of modules made by hand). The app is designed to offer a set of modular functions that is both comprehensive and eclectic, including several tools for generative synthesis, random signals and the surgical mangling of audio waves and modulation signals. A lot of effort went into making everything sound and behave as analog as digitally possible (with the exception of the unashamedly digital Entropy lo-fi effect processor). Additionally, the built-in Instability Engine injects the subtle fluctuations simulating the effects of crosstalk, leaky signals and expired electrical components. This is a living instrument with a soul of its own. - Full Audio Unit compatibility (AUv3 instrument, audio effect) - Universal design (iPhone, iPad, MacOS AUv3) - Built-in Pulsequencer (LFO-based generative melody generator with custom scales) - 4 mode Low-pass filter (6, 12, 18, 24 dB) - 3 voice polyphony - Drone mode - Stackable patch cables - DIY Lo-Fi digital delay circuit emulation - All synth settings exposed a AU Parameters (for automation and MIDI learning in your host of choice) Find the user manual on ruismaker.com
Screenshots
Verdict
The clearest difference is rating: Solderbox at 5.0 against VADrumSM's 4.8. Solderbox also leads on ratings volume (27 vs 6). VADrumSM's advantage is price ($9.99 vs $12.99) and review sentiment (100% vs 90%). On update cadence, ads, in-app purchases and monetization model 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
VADrumSM costs $9.99 and Solderbox $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Solderbox holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 6 and 27 respectively. Written reviews complicate that: 100% of VADrumSM's written reviews are positive against 90% of Solderbox's, so the app with the better star average is not the one people write more warmly about.
VADrumSM ships an update monthly, Solderbox every 6 weeks. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.
| Parameter | VADrumSM | Solderbox |
|---|---|---|
| Price | $9.99 — better | $12.99 |
| Rating | 4.8 (6 ratings) | 5.0 (27 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 90.0% of reviews |
| Number of ratings | 6 | 27 — better |
| Update frequency | Monthly — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 | 13 |
| Further details — not scored | ||
| Size | 21 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryo Togawa | Bram Bos |
Customer experience
VADrumSM
Solderbox
In-app purchases
VADrumSM
No in-app purchases
Solderbox
No in-app purchases









