# SyndtSphere vs Solderbox

The clearest difference is review sentiment: Solderbox at 90% against SyndtSphere's 40%. Solderbox also leads on rating (5.0 vs 3.7) and update cadence (every 6 weeks vs every 23 months). SyndtSphere's advantage is price ($1.99 vs $12.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

SyndtSphere costs $1.99 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 3.7. Both are backed by a comparable volume of ratings — 18 and 27 respectively. Written reviews point the same way: 40% of SyndtSphere's written reviews are positive against 90% of Solderbox's.

SyndtSphere ships an update every 23 months, Solderbox every 6 weeks. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | SyndtSphere | Solderbox |
| --- | --- | --- |
| Price | **$1.99** | $12.99 |
| Rating | [3.7 (18 ratings)](https://appshunter.io/ios/app/syndtsphere/id1273945851/reviews) | **[5.0 (27 ratings)](https://appshunter.io/ios/app/solderbox/id6502593345/reviews)** |
| Number of ratings | 18 | **27** |
| Positive reviews | 40.0% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 6 weeks** |
| Monetization | Paid | Paid |
| Size | 15 MB | 8 MB |
| Requires iOS | 13.0 | 13 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Klevgrand Produkter AB](https://appshunter.io/developer/1118902192) | [Bram Bos](https://appshunter.io/developer/325340444) |

## What reviewers say

### SyndtSphere

[App page](https://appshunter.io/ios/app/syndtsphere/id1273945851)

Explore a novel approach to sound design with this synthesizer. Rotate a sphere with over 70 presets to discover ideal sounds, enhanced by a stereo ping-pong delay and global settings. It's AUv3 compatible for use within other music production apps.

**Highlights:** Spherical sound exploration, AUv3 plugin compatibility, High-quality audio engine, Stereo ping-pong delay, Legato mode with glide

**Features:** Vision Pro support

**In-app purchases:** none


### Solderbox

[App page](https://appshunter.io/ios/app/solderbox/id6502593345)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SyndtSphere free?

SyndtSphere costs $1.99, with no in-app purchases.

### Is Solderbox free?

Solderbox costs $12.99, with no in-app purchases.

### Which has better reviews, SyndtSphere or Solderbox?

Solderbox is rated higher. SyndtSphere averages 3.7 out of 5 from 18 ratings, while Solderbox averages 5.0 from 27 ratings.

### Do SyndtSphere or Solderbox have ads?

Neither SyndtSphere nor Solderbox shows ads.

### Which is updated more often, SyndtSphere or Solderbox?

SyndtSphere ships an update every 23 months, and Solderbox every 6 weeks. Most recently, SyndtSphere was updated on October 9, 2026 and Solderbox on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*