iProphet Synthesizer vs OB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iProphet Synthesizer
This app emulates the classic Sequential Circuits Prophet VS synthesizer, offering its unique digital sound. Sculpt sounds with four digital oscillators, a multimode filter, and extensive modulation options. It includes over 500 presets and integrates with other music production tools.
- Vector screen with joysticks
- Modulation Matrix
- 3 DSP effects
- 96 waveforms
- 4 filter types
- Vector envelope
- Unison/detune
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When a punchy, fat sound is demanded, look no further. iProphet recreates the unique sound of the classic Sequential Circuits Prophet VS synthesizer. Need help? Have an issue or question? Please email us at support@retronyms.com. The Prophet VS's rareness and classic digital sound make it a mainstay for those who can find them. The sound is purely classic crisp digital sound that easily stands on its own, but at the same time is the perfect compliment to the sound of analog synthesizers. iProphet brings the crystaline vintage sound of four digital oscillators and allows sculpting them using a creamy and warm multimode filter. iProphet comes with over 500 presets created by some of todays best sound designers. Use it in Tabletop to compose your music. You can morph the sound of the 4 oscillators using the joystick or the vector mode and the vector envelope. You can also swap presets between iProphet and Arturia's Prophet V synthesizer which allows you to work on the iPad and finish in the DAW of your choice. iProphet is a Tabletop Ready app. The connect menu allows you to connect iProphet to the Retronyms Tabletop app, giving you an integration with a complete studio environment. Tabletop also features add-ons for more effects and instruments from other 3rd party companies. iProphet supports Core MIDI, interapp-audio as well as Audiobus technologies for perfect integration. The use of the brands 'Prophet' and 'Sequencial Circuits' is done with permission of Dave Smith Instruments. Features Include: - Vector screen with joysticks to mix oscillators and envelopes - Super flexible Modulation Matrix - 3 DSP effects (overdrive, delay, and chorus) - 96 different wave forms to control pitch - 4 filter types - Vector envelope featuring loop points - Unison/detune for beefy sounds - Full user MIDI mapping of panel controls - Tabletop Ready app - Soundcloud seeder (via Tabletop) - Render to .wav file (via Tabletop) - AudioCopy to paste your audio into another iPad application (via Tabletop)
OB
This app recreates a classic vintage synthesizer, offering rich, full-bodied tones for electronic music, recordings, and film scores. It features MPE support, an on-screen MIDI keyboard, and high-quality rendering for enhanced music production.
- Oberheim OB-X emulation
- MPE support
- On-screen MIDI keyboard
- High-quality retina rendering
- AUv3 improvements
- Preset search with categories
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OB-Xd is a classic synthesizer that captivates musicians with its rich, full-bodied tones and expansive sound design. Perfect for adding a vintage touch to electronic tracks, live recordings, or film scores, OB-Xd brings unique and expressive qualities to your music. Designed to recreate the Oberheim OB-X, it features enhancements like micro random detuning and unison for a fuller sound. Elevate your studio setup and music production with OB-Xd today. • Full MPE support with configurable pitch bend, aftertouch, timbre, and pressure depth. • On-screen MIDI keyboard with pitch bend and mod wheels (iPad only). • Native iOS popups, dialogs, and text input throughout the interface. • Search Presets with category subfolders and native no-results dialog. • High-quality retina rendering. • AUv3 improvements: async file choosers, host viewport resize, and Bluetooth MIDI access.
Screenshots
Verdict
The clearest difference is price: iProphet Synthesizer at $9.99 against OB's $19.99. iProphet Synthesizer also leads on iOS requirement (8.0 vs 15.0). OB's advantage is rating (4.1 vs 3.5) and review sentiment (75% vs 34%). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
iProphet Synthesizer costs $9.99 and OB $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
OB holds the better App Store score, 4.1 against 3.5. Both are backed by a comparable volume of ratings — 32 and 15 respectively. Written reviews point the same way: 34% of iProphet Synthesizer's written reviews are positive against 75% of OB's.
iProphet Synthesizer ships an update every 5 months, OB every 10 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.
| Parameter | iProphet Synthesizer | OB |
|---|---|---|
| Price | $9.99 — better | $19.99 |
| Rating | 3.5 (32 ratings) | 4.1 (15 ratings) — better |
| Positive reviews | 34.0% of reviews | 75.0% of reviews — better |
| Number of ratings | 32 — better | 15 |
| Update frequency | Every 5 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 85 MB | 210 MB |
| Age rating | 4+ | 4+ |
| Developer | Arturia | DiscoDSP LLC |
Customer experience
iProphet Synthesizer
OB
Bugs and requests
iProphet Synthesizer
Reported bugs
15 issues- Audio distortion and crackling in all presets
- App crashes on iOS 14+ versions
- Inter-app audio (IAA) connection requires multiple restarts
- Preset changes cause app freezes and audio cutouts
- Stuck and hanging notes when sliding on keyboard
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- Modulation settings incorrectly apply across different presets
- Low-frequency humming loop persists during playback
- AirPods Max audio quality degradation
- Audiobus integration causes lockout and screeching
- iPad goes to sleep during drone playback
- Save preset function not working
- Waveform display shows white blocks in Tabletop
- Sustain pedal not responding to MIDI messages
- Preset polyphony status changes unexpectedly
- App becomes unresponsive in DAW environments
Requested features
14 requests- AUv3 plugin support for Logic Pro and other DAWs
- Ability to save custom patches and presets
- Velocity and aftertouch MIDI support
- MIDI control for joystick parameter
- User-defined waveform creation
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- Full 8-note polyphony support
- Background audio playback capability
- MIDI output functionality
- Master transpose feature
- Key and velocity zones
- Sequencer built into app
- Sample rate adjustment options
- Persistent MIDI channel settings
- Last preset memory on app launch
OB
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iProphet Synthesizer
No in-app purchases
OB
No in-app purchases
Questions
Is iProphet Synthesizer free?
Is OB free?
Which has better reviews, iProphet Synthesizer or OB?
Do iProphet Synthesizer or OB have ads?
Which is updated more often, iProphet Synthesizer or OB?
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