# Sunrizer synth vs OB

The clearest difference is review sentiment: Sunrizer synth at 88% against OB's 57%. Sunrizer synth also leads on rating (4.7 vs 4.4) and price ($12.99 vs $14.99). OB's advantage is update cadence (every 2 months vs every 6 months) and chart position (#152 vs unranked). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Sunrizer synth costs $12.99 and OB $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sunrizer synth holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 183 and 65 respectively. Written reviews point the same way: 88% of Sunrizer synth's written reviews are positive against 57% of OB's.

Sunrizer synth ships an update every 6 months, OB every 2 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Sunrizer synth | OB |
| --- | --- | --- |
| Price | **$12.99** | $14.99 |
| Rating | **[4.7 (183 ratings)](https://appshunter.io/ios/app/sunrizer-synth/id443663267/reviews)** | [4.4 (65 ratings)](https://appshunter.io/ios/app/ob-xd-auv3-synth/id1465262829/reviews) |
| Number of ratings | **183** | 65 |
| Positive reviews | **87.8% of reviews** | 57.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Best chart rank | — | **#152** |
| Size | 28 MB | 25 MB |
| Requires iOS | **10.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BeepStreet](https://appshunter.io/developer/321412321) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Sunrizer synth

[App page](https://appshunter.io/ios/app/sunrizer-synth/id443663267)

This virtual analog synthesizer offers a rich, warm sound with advanced features like SuperSaw emulation and morphing parameter control. It integrates seamlessly with MIDI hardware and sequencers, providing a professional-grade sound design experience on iOS.

**Highlights:** SuperSaw sound emulation, Dual filters with configurable routing, Morph Group for parameter control, CoreMidi and background audio support, Multi-mode oscillator multiplication, Microtuning support

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

**In-app purchases:** none

**What reviewers like**

- 🎨 Exceptional sound quality
- 👍 Intuitive and easy-to-use interface
- 🎹 Powerful and flexible synth engine
- 💡 Excellent preset library
- 🎚️ Comprehensive modulation and effects

**What reviewers complain about**

- 🐛 Occasional crashes and glitches
- 🔌 Compatibility issues with certain DAWs
- 🔇 Limited audio export options
- 🧭 Confusing preset management

**Reported bugs**

- Synth freezes when loading certain presets
- Inconsistent behavior when using multiple instances
- Graphical issues on newer iPad models

**Requested features**

- Improved MIDI integration and control
- Expanded arpeggiator and sequencing capabilities
- More advanced sound design tools
- Ability to save custom tunings


### OB

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

**Currently charting:** #152 Top Paid · Music (US App Store)

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 Sunrizer synth free?

Sunrizer synth costs $12.99, with no in-app purchases.

### Is OB free?

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

### Which has better reviews, Sunrizer synth or OB?

Sunrizer synth is rated higher. Sunrizer synth averages 4.7 out of 5 from 183 ratings, while OB averages 4.4 from 65 ratings.

### Do Sunrizer synth or OB have ads?

Neither Sunrizer synth nor OB shows ads.

### Which is updated more often, Sunrizer synth or OB?

Sunrizer synth ships an update every 6 months, and OB every 2 months. Most recently, Sunrizer synth was updated on September 29, 2026 and OB on October 3, 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.*