FM 304 vs CACHE
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.
CACHE
This app provides a dedicated sample browser for iOS music producers. It allows users to quickly browse, preview, and drag audio files directly into compatible DAWs and AUv3 hosts, streamlining music creation workflows.
- Browse sample folders and subfolders
- Preview one-shots and loops
- Detect sample key
- Drag samples into compatible DAWs
- Access local and cloud storage
- Bookmark folders without copying samples
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CACHE is a fast and simple sample browser for iPhone, iPad, and AUv3 hosts. It lets you open your own sample folders, browse collections instantly, preview audio files, detect sample key, and drag sounds straight into compatible apps and hosts. Built for producers who work across iOS and iPadOS, CACHE solves a problem that has been strangely overlooked for years: some DAWs and AUv3 hosts still don’t include a proper sample browser. Until now, that often meant digging through Files, switching between apps, and dragging samples in from outside your music workflow. CACHE puts that missing browser exactly where you need it. Use CACHE to: Browse your own sample folders and subfolders Preview one-shots and loops quickly Detect likely sample key for one-shots Drag samples directly into compatible DAWs, hosts, and apps Access collections from local storage, cloud locations, or external drives CACHE does not include any samples and does not make sound on its own beyond sample preview. You must supply your own sample folders. CACHE also does not copy or store your samples internally. It simply bookmarks and browses the folders you choose, so it won’t take up extra storage space with duplicate sample libraries. That makes it especially useful if your sounds live on external storage or outside the app itself.
Screenshots
Verdict
FM 304 and CACHE both sit at 4.8 stars, but that hides the real split: 100% of FM 304's written reviews are positive against 67% of CACHE's. FM 304 also leads on iOS requirement (12.0 vs 17). CACHE's advantage is update cadence (every 4 days vs every 43 months) and price ($2.99 vs $3.99). On rating, ratings volume, 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
FM 304 costs $3.99 and CACHE $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CACHE holds the better App Store score, 4.9 against 4.8. Both are backed by a comparable volume of ratings — 4 and 10 respectively. Written reviews complicate that: 100% of FM 304's written reviews are positive against 67% of CACHE's, so the app with the better star average is not the one people write more warmly about.
FM 304 ships an update every 43 months, CACHE every 4 days. The most recent releases landed on October 2, 2026 and October 8, 2026 respectively.
| Parameter | FM 304 | CACHE |
|---|---|---|
| Price | $3.99 | $2.99 — better |
| Rating | 4.8 (4 ratings) | 4.9 (10 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 4 | 10 — better |
| Update frequency | Every 43 months | Every 4 days — better |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad — better |
| Requires iOS | 12.0 — better | 17 |
| Further details — not scored | ||
| Size | 17 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Betowski | LEWIS GARETH K LE VAL |
Customer experience
FM 304
CACHE
In-app purchases
FM 304
No in-app purchases
CACHE
No in-app purchases









