FM 304 vs Violibration Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FM 304
Create music with three powerful FM synthesizers, each featuring integrated sequencers and onboard effects. This app offers intuitive real-time control over all synth parameters for quick sound design and tune creation.
- Three 4-operator FM synths
- Integrated sequencers
- Onboard delay, reverb, and chorus effects
- One knob per function control
- 100 save slots
- 8 algorithms
- Note frequency quantize
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FM 304 — 3x FM Synth Groovebox FM 304 is a powerful trio of 4-operator FM synthesizers, each with its own sequencer and effects. Built for fast, hands-on sound design, every parameter is available with a one-knob-per-function layout — no menus, no digging. Create evolving patterns, punchy sequences, and complex FM textures in seconds. Everything is on screen, ready to tweak, making it easy to move from idea to finished loop without breaking flow. Features • 3 independent 4-operator FM synthesizers • Immediate one-knob-per-function control • 3x 16-step sequencers (one per synth) • Built-in effects: delay, reverb, chorus • 3x LFOs for modulation • 8 FM algorithms • Note frequency quantisation • 100 save slots Designed for speed No menu diving. No setup. Just pure FM synthesis with everything visible and playable.
Violibration Studio
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Violibration Studio lets you create, organise, save, and perform in-app haptic patterns on iPhone. Use the Haptic Board to play patterns directly. Build and edit ideas in the Composer Canvas. Save your work in the Library, then reuse, manage, import, or export patterns when needed. Features include: • Haptic Board • Composer Canvas • Library • Import and Export • Performance Mode • Chain Sequencing • Comfort Mode Performance Mode provides a simplified playback view for live use. Chain Sequencing lets you arrange multiple patterns into a longer playback flow. Comfort Mode reduces intensity for a gentler in-app experience. Violibration Studio is designed for creating and playing haptic content inside the app. It does not provide system-wide vibration control.
Screenshots
Verdict
The clearest difference is in-app purchases: FM 304 at none against Violibration Studio's 8. FM 304 also leads on price ($3.99 vs $9.99) and iOS requirement (12.0 vs 18.6). Violibration Studio's advantage is update cadence (every 3 weeks vs every 43 months). On device support 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
FM 304 costs $3.99 and Violibration Studio $9.99 up front. Violibration Studio sells 8 one-off in-app purchases. FM 304 asks for nothing beyond the download.
FM 304 ships an update every 43 months, Violibration Studio every 3 weeks. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.
| Parameter | FM 304 | Violibration Studio |
|---|---|---|
| Price | $3.99 — better | $9.99 |
| Rating | 4.8 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 43 months | Every 3 weeks — better |
| Ads | — | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 12.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 17 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Betowski | Thomas Richardson |
In-app purchases
FM 304
No in-app purchases
Violibration Studio
- Deep Focus$0.29
- Breath Arc$0.29
- Rainglass$0.29
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- Sunset Drift$0.29
- Grounding Grid$0.29
- Stride Signal$0.29
- Pulse Lab$0.29
- Unlock Everything$1.99
Questions
Is FM 304 free?
Is Violibration Studio free?
Which is updated more often, FM 304 or Violibration Studio?
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