# Geo Synthesizer vs PaSSBot

The clearest difference is price: Geo Synthesizer at $9.99 against PaSSBot's $34.99. Geo Synthesizer also leads on device support (3 vs 1) and iOS requirement (9.0 vs 11.0). PaSSBot's advantage is rating (5.0 vs 3.3) and review sentiment (100% vs 68%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Geo Synthesizer costs $9.99 and PaSSBot $34.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PaSSBot holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 19 and 8 respectively. Written reviews point the same way: 68% of Geo Synthesizer's written reviews are positive against 100% of PaSSBot's.

Geo Synthesizer ships an update every 11 months, PaSSBot every 4 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Geo Synthesizer | PaSSBot |
| --- | --- | --- |
| Price | **$9.99** | $34.99 |
| Rating | [3.3 (19 ratings)](https://appshunter.io/ios/app/geo-synthesizer/id465224352/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/passbot/id1557720096/reviews)** |
| Number of ratings | **19** | 8 |
| Positive reviews | 68.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 months** |
| Monetization | Paid | Paid |
| Size | 27 MB | 11 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wizdom Music LLC](https://appshunter.io/developer/377345351) | [SonicPlanet Audio Video Teknolojileri Anonim Sti.](https://appshunter.io/developer/946568989) |

## What reviewers say

### Geo Synthesizer

[App page](https://appshunter.io/ios/app/geo-synthesizer/id465224352)

This app is an expressive musical instrument and MIDI controller designed for multitouch surfaces. It offers advanced pitch control, custom sounds, and the ability to control external instruments or virtual MIDI apps. It also supports AudioBus for interconnecting audio apps.

**Highlights:** Expressive multitouch interface, Advanced pitch bending, MIDI output, AudioBus support, Customizable performance menus, Multiple temperament options, Load SampleWiz presets

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative and expressive instrument
- 👍 Intuitive and adjustable interface
- 🚀 Fast and responsive performance
- 🎶 Great sound quality
- 🎛️ Excellent MIDI controller capabilities

**What reviewers complain about**

- 🐛 Glitchy sound on iPad Pro
- ❌ App not working correctly
- 🗑️ Abandoned by developer
- ❓ Mistaken purchase
- 🚫 No longer works on iPadOS

**Reported bugs**

- Glitchy sound on iPad Pro
- App not working correctly
- No longer works on iPadOS
- Clicking sound on iPhone 6
- Core MIDI not working like before (iOS 9)

**Requested features**

- Update for iPadOS
- Fix glitchy sound on iPad Pro
- Support for Bluetooth MIDI
- Refund option
- Fix zooming issue on iPhone 11


### PaSSBot

[App page](https://appshunter.io/ios/app/passbot/id1557720096)

This app is a stochastic filter bank audio processor for iPad, offering advanced sound manipulation with various filter types and powerful stochastic generators. It allows for precise control over filter parameters and harmonic distribution, ideal for creating complex audio textures.

**Highlights:** Stochastic filter bank audio processor, Multiple filter types (Biquad, Ladder, SEM, Resonators), Up to 64 filters in stereo, Powerful stochastic generators, Individual filter parameter control, Harmonic distribution options, Precision DSP rendering (<1ms control rate)

**In-app purchases:** none


## Frequently asked questions

### Is Geo Synthesizer free?

Geo Synthesizer costs $9.99, with no in-app purchases.

### Is PaSSBot free?

PaSSBot costs $34.99, with no in-app purchases.

### Which has better reviews, Geo Synthesizer or PaSSBot?

PaSSBot is rated higher. Geo Synthesizer averages 3.3 out of 5 from 19 ratings, while PaSSBot averages 5.0 from 8 ratings.

### Do Geo Synthesizer or PaSSBot have ads?

Neither Geo Synthesizer nor PaSSBot shows ads.

### Which is updated more often, Geo Synthesizer or PaSSBot?

Geo Synthesizer ships an update every 11 months, and PaSSBot every 4 months. Most recently, Geo Synthesizer was updated on October 24, 2026 and PaSSBot on October 23, 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.*