# Solderbox — Generative Semi-modular Synth

> Generative semi-modular synthesizer with analog emulation and unique digital effects. (iPhone/iPad app by Bram Bos.)

- Source: https://appshunter.io/ios/app/solderbox/id6502593345 (this page in markdown: same URL + `.md`)
- Developer: [Bram Bos](https://appshunter.io/developer/325340444)
- Category: Music
- Price: $12.99
- Rating: 5.00/5 from 27 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 13 · 8 MB
- Languages: American English
- Released: 2024-12-10
- Data updated: 2026-08-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/solderbox/id6502593345/reviews.md

## What is Solderbox?

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

## Key features

- 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

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/solderbox/id6502593345/reviews.md

### 5/5 — Awesome‼️

*2025-05-18*

So 😎 - love this synth - 😌

### 5/5 — Equal to or Better than RippleMaker

*2025-04-17*

RippleMaker has still been my go-to for getting lost in making/shaping sounds. This app offers even more. If you like RM, you will like this.

### 5/5 — Ultra cool patchable synth

*2025-03-20*

This is incredibly fun and experimental. The sounds are great and presets are sick. I love the fact that the cables can stack in the patch, for multi targeting. This is also a hyper SFX and sound design beast. Oh yeah I like the Easter egg a lot…. Cheers.

### 5/5 — Banger Device!

*2025-02-25*

i dont know how realistic that is... but a super simple sequencer for example exactly triggering a kick drum... :) one 16 pads long line couldalready be it..... 

other then that, huuuuuuuuuuuugely wonderful synth!

### 5/5 — HaQ + Bos = Lush sonic mayhem! 🐝

*2025-01-11*

Really loving this awesome new release from our cherished iOS developer Bram Bos and the brilliant electronic music fiend  Jakob HaQ (naturally ...you just knew she was going to be a wild one) ...and it certainly doesn't disappoint! Solderbox simply oozes finesse, eccentricity and attitude, with a rich diverse pallet of nuances, timbres, textures and colours (it basically sounds utterly delicious)!

The tweaking possibilities alone will satisfy seasoned modular fiends but it's also very intuitive and accessible and just pure fun to explore! Naturally the GUI and design is beautiful constructed and well considered throughout. Combine this with a feature rich sonic playground just screaming for exploration and discovery and it's a sonic tweaker's  paradise! Extremely cool!

### 4/5 — Very Good, could be Great

*2024-12-17*

I know next to nothing about modular and I got this to learn.  Some knowledge is needed because just plugging things in at random often has no effect. I suspect this is because some modules need an input in order to provide an output.  One small change that could help people visualize the signal better is to have a status LED next to each output, similar to the LFO status LED. Or maybe make the wires glow brighter with their signal.  Another option is to offer an oscilloscope module but I suspect that would require more effort.

### 5/5 — Another rare gem like Hilda

*2024-12-14*

Bram Bos makes the best (indie) apps for iOS. This is no exception. With help from Jaqob Haq, this is going to easily be considered maybe the best synth of 2024. It is very unique, as expected from Bram Bos and the videos and reviews don’t do the instrument justice. Just like Hilda, you need to really use it to understand how great it is.

### 1/5 — Solderbox review

*2024-12-11*

It’s a great synth for the price unfortunately it makes Logic Pro on the M4 iPad Pro crash

**Developer response:** The problem has been fixed since update 1.0.1. Please consider updating your rating. Thanks.

### 5/5 — Semi-Modular | Fully-Fantastic | A New Favorite

*2024-12-11*

Another incredibly intuitive, well designed, deeply considered, and just all around fun instrument to make some noise with. Brams previous collaborations with Hainbach were brilliant, this collaboration with Jakob is no less so, it’s a fantastic collaboration I hope everyone enjoys as much as I have. 

I’m grateful, Bram, that you find those creators inspiring enough to collab with, so that he can share your software wizardry with us other musicians to get inspired by. Thank you! 🎶🎹🪗

## Frequently asked questions about Solderbox

### What is Solderbox?

Solderbox is a compact semi-modular synthesizer app designed for generative music creation. It aims to emulate analog sound and behavior while offering unique digital effects and an 'Instability Engine' for organic sound fluctuations.

### What devices does Solderbox support?

Solderbox is a universal app and supports iPhone, iPad, and Mac. It functions as an AUv3 instrument and audio effect on compatible devices.

### How much does Solderbox cost?

Solderbox is a paid application, priced at $12.99. There are no in-app purchases or subscriptions for this app.

### Does Solderbox have ads?

No, Solderbox does not contain advertisements. It is a premium application that offers an ad-free music creation experience.

### What are the key features of Solderbox's sound engine?

Solderbox features generative synthesis tools, an 'Instability Engine' for simulating analog component fluctuations, and a DIY Lo-Fi digital delay circuit emulation. It also includes a 4-mode low-pass filter and 3-voice polyphony.

### Can Solderbox be used with other music apps?

Yes, Solderbox fully supports Audio Unit (AUv3) compatibility as both an instrument and an audio effect. This allows it to be integrated and automated within your preferred host music applications.

### How often is Solderbox updated?

Solderbox was last updated on December 23, 2025, with version 1.0.5. This indicates a recent update, suggesting ongoing support and potential for future improvements.

### What is the age rating for Solderbox?

Solderbox has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals, with no mature content concerns.

## Version history (last 5 releases)

### 1.0.5 — 2025-12-23

Pulsequencer module now respects the playback state of the host, when loaded in plugin mode. This makes it easier to integrate patches using the sequencer in your DAW setup. Hit your DAW's play button to start running the patch.

### 1.0.4 — 2025-04-14

Small bug fix in the standalone version of the app.

### 1.0.3 — 2025-03-05

Standalone app can now run in the background
- enable this feature in Settings.app page for Solderbox
- don't forget to manually close Solderbox when this is enabled!

### 1.0.2 — 2024-12-17

1.0.2 Quickie Update: 
- improvement to the stacking behavior

1.0.1 Update:
- Fix for rare crashes in Logic Pro and Garageband
- Stackable cables can now also be dragged from inputs into outputs
- Screen-scroll widget appears when screen gets too narrow
- Fixed swap of Octatone and Wholetone scales
- Improved compatibility for old MacOS versions
- Pulsequencer knobs now update on release

### 1.0.1 — 2024-12-16

- Fix for rare crashes in Logic Pro and Garageband
- Stackable cables can now also be dragged from inputs into outputs
- Screen-scroll widget appears when screen gets too narrow
- Fixed swap of Octatone and Wholetone scales
- MacOS version should now run on older MacOS system versions
- Pulsequencer knobs now update on release

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## More apps by Bram Bos

- [Ruismaker](https://appshunter.io/ios/app/ruismaker/id1122156899)
- [Ruismaker FM](https://appshunter.io/ios/app/ruismaker-fm/id1143644577)
- [Phasemaker](https://appshunter.io/ios/app/phasemaker/id1161642832)
- [Troublemaker](https://appshunter.io/ios/app/troublemaker/id1180892130)
- [Ripplemaker](https://appshunter.io/ios/app/ripplemaker/id1207806723)
- [Rozeta Sequencer Suite](https://appshunter.io/ios/app/rozeta-sequencer-suite/id1292546479)

All apps by Bram Bos: https://appshunter.io/developer/325340444

## Related topics

[discovery auv3 synth](https://appshunter.io/ios/topics/discovery-auv3-synth)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*