# FM 304 vs Violibration Studio

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.

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.

## The numbers

| Metric | FM 304 | Violibration Studio |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/fm-304/id1449167984/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 43 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 17 MB | 16 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Betowski](https://appshunter.io/developer/538476580) | [Thomas Richardson](https://appshunter.io/developer/1887851473) |

## What reviewers say

### FM 304

[App page](https://appshunter.io/ios/app/fm-304/id1449167984)

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.

**Highlights:** 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

**In-app purchases:** none


### Violibration Studio

[App page](https://appshunter.io/ios/app/violibration-studio/id6761793199)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Deep Focus | $0.29 | one-time |
| Breath Arc | $0.29 | one-time |
| Rainglass | $0.29 | one-time |
| Sunset Drift | $0.29 | one-time |
| Grounding Grid | $0.29 | one-time |
| Stride Signal | $0.29 | one-time |
| Pulse Lab | $0.29 | one-time |
| Unlock Everything | $1.99 | one-time |


## Frequently asked questions

### Is FM 304 free?

FM 304 costs $3.99, with no in-app purchases.

### Is Violibration Studio free?

Violibration Studio costs $9.99, and also offers in-app purchases.

### Which is updated more often, FM 304 or Violibration Studio?

FM 304 ships an update every 43 months, and Violibration Studio every 3 weeks. Most recently, FM 304 was updated on October 2, 2026 and Violibration Studio on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*