# Dexed Synth vs OB

The clearest difference is price: Dexed Synth at $3.99 against OB's $14.99. OB's advantage is rating (4.4 vs 3.1) and review sentiment (57% vs 29%). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Dexed Synth costs $3.99 and OB $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OB holds the better App Store score, 4.4 against 3.1. Both are backed by a comparable volume of ratings — 43 and 65 respectively. Written reviews point the same way: 29% of Dexed Synth's written reviews are positive against 57% of OB's.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 15, 2026.

## The numbers

| Metric | Dexed Synth | OB |
| --- | --- | --- |
| Price | **$3.99** | $14.99 |
| Rating | [3.1 (43 ratings)](https://appshunter.io/ios/app/dexed-synth/id1462551596/reviews) | **[4.4 (65 ratings)](https://appshunter.io/ios/app/ob-xd-auv3-synth/id1465262829/reviews)** |
| Number of ratings | 43 | **65** |
| Positive reviews | 28.8% of reviews | **57.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 105 MB | 25 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [George Rosar](https://appshunter.io/developer/1462550889) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Dexed Synth

[App page](https://appshunter.io/ios/app/dexed-synth/id1462551596)

This app brings a powerful FM synthesizer to your mobile device, offering a vast library of sounds. It integrates with popular DAWs and supports external MIDI controllers for enhanced control and performance.

**Highlights:** FM Synthesizer port, Over 20,000 cartridges with 32 patches each, AudioUnit AUv3 plugin support, MIDI controller input via USB, Lock scroll and parameter locking, MIDI CC mapping

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OB

[App page](https://appshunter.io/ios/app/ob-xd-auv3-synth/id1465262829)

This app emulates the classic Oberheim OB-X synthesizer, offering its rich sound and behavior with added enhancements. It focuses on sonic quality and includes micro random detuning for authentic analog warmth. External effects are recommended to further shape its versatile soundscapes.

**Highlights:** Oberheim OB-X emulation, Recreates original sound and behavior, Added enhancements to original design, Micro random detuning, Rich and good sound quality

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🎶 Incredible sound quality
- ✨ Inspiring creative tool
- 🎹 Faithful emulation of classic synth
- 🎛️ Great for programming
- 🎚️ Useful presets

**What reviewers complain about**

- 🐛 Unusable UI on older devices
- 💻 Poor GUI scaling on iPad Pro
- 🎛️ Controls unresponsive or misaligned
- 📉 Limited functionality without updates
- 🤷‍♂️ No clear upgrade path

**Reported bugs**

- Crashes in Audiobus
- Cannot use in MIDI section of Audiobus
- Preset browser issues (scrolling, cut off banks)
- Automation bug with cutoff freq
- UI issues on iPad Pro (buttons misaligned, text cut off)

**Requested features**

- Add last/high priority for mono patches
- Increase polyphony to 8 voices
- MIDI Learn functionality
- Preset browser improvements (categories, scrolling)
- Adjustable keyboard size


## Frequently asked questions

### Is Dexed Synth free?

Dexed Synth costs $3.99, with no in-app purchases.

### Is OB free?

OB costs $14.99, with no in-app purchases.

### Which has better reviews, Dexed Synth or OB?

OB is rated higher. Dexed Synth averages 3.1 out of 5 from 43 ratings, while OB averages 4.4 from 65 ratings.

### Do Dexed Synth or OB have ads?

Neither Dexed Synth nor OB shows ads.

### Which is updated more often, Dexed Synth or OB?

Dexed Synth ships an update every 2 months, and OB every 2 months. Most recently, Dexed Synth was updated on October 15, 2026 and OB on October 15, 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.*