# GRM studio vs BAM

The clearest difference is price: GRM studio at Free against BAM's $12.99. GRM studio also leads on in-app purchases (none vs 11) and review sentiment (100% vs 73%). BAM's advantage is rating (4.8 vs 4.0) and ratings volume (103 vs 1). On ads and device support there is nothing between them.

GRM studio is free to download; BAM costs $12.99 up front. BAM sells 11 one-off in-app purchases. GRM studio asks for nothing beyond the download.

BAM holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: BAM has 103 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of GRM studio's written reviews are positive against 73% of BAM's, so the app with the better star average is not the one people write more warmly about.

GRM studio ships an update weekly, BAM every 3 weeks. The most recent releases landed on October 18, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | GRM studio | BAM |
| --- | --- | --- |
| Price | **Free** | $12.99 |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/grm-studio/id1448936613/reviews) | **[4.8 (103 ratings)](https://appshunter.io/ios/app/bam-beat-maker-and-music-maker/id1637599765/reviews)** |
| Number of ratings | 1 | **103** |
| Positive reviews | **100.0% of reviews** | 73.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 35 MB | 490 MB |
| Requires iOS | **9.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Institut National de l'Audiovisuel](https://appshunter.io/developer/480730772) | [Imaginando Lda](https://appshunter.io/developer/895445015) |

## What reviewers say

### GRM studio

[App page](https://appshunter.io/ios/app/grm-studio/id1448936613)

This music creation app offers advanced sound manipulation tools for musicians and sound designers. Explore and edit audio files through direct waveform manipulation and multiple playback processes.

**Highlights:** Real-time sound transformation simulation, Direct waveform exploration, Virtual editing and montage, Multiple playback processes, Granular synthesis

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

**In-app purchases:** none


### BAM

[App page](https://appshunter.io/ios/app/bam-beat-maker-and-music-maker/id1637599765)

This app is a professional music production tool that allows users to create beats, loops, and full tracks. It offers a versatile interface with built-in instruments, effects, and extensive sequencing capabilities. Users can also host AUv3 plugins and arrange music for live performance or export.

**Highlights:** Groovebox-style music production, AUv3 plugin host, Built-in instruments and effects, Step sequencer with 256 steps, MIDI clip and scene launcher, Full mixer controls, Clip-based parameter modulation

**Features:** Family Sharing

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fusion City Grooves | $8.99 | one-time |
| House Flavours Pack | $8.99 | one-time |
| Techno Flavours Pack | $8.99 | one-time |
| Bass Mechanics Pack | $8.99 | one-time |
| Ladera Nights Pack | $8.99 | one-time |
| Soulful Hip Hop Vol. 1 Pack | $8.99 | one-time |
| Urban Beats Vol. 1 Pack | $8.99 | one-time |
| Retro Future Pack | $8.99 | one-time |
| Brazilian Funk Pack | $8.99 | one-time |
| Urban Beats Vol. 2 Pack | $8.99 | one-time |
| Velvet Vibes | $8.99 | one-time |

**What reviewers like**

- 👍 Intuitive workflow
- 🎶 Great sound quality
- 💡 Innovative groovebox concept
- 🚀 Fast to get started
- 🎧 Excellent for live jamming

**What reviewers complain about**

- 🐛 Frequent crashing/hanging
- 📉 High CPU usage
- 🤏 Small and hard-to-see controls
- 🤔 Counterintuitive for some users
- 🔊 Low resolution sound quality for price

**Reported bugs**

- Frequent hanging of the app
- Extension packs causing hangs (Velvet vibes, LN90s)
- App freezes in AUM and Drambo
- Loading audio stems is cumbersome and leads to freezing
- Random crashing frequently

**Requested features**

- More integrated effects & plugins
- Pause button for plugins
- CC Randomizer function
- Keyboard mode with multiple digital keyboards
- IAA (Inter-App Audio) support


## Frequently asked questions

### Is GRM studio free?

GRM studio is free to download, with no in-app purchases.

### Is BAM free?

BAM costs $12.99, and also offers in-app purchases.

### Which has better reviews, GRM studio or BAM?

BAM is rated higher. GRM studio averages 4.0 out of 5 from 1 ratings, while BAM averages 4.8 from 103 ratings.

### Do GRM studio or BAM have ads?

Neither GRM studio nor BAM shows ads.

### Which is updated more often, GRM studio or BAM?

GRM studio ships an update weekly, and BAM every 3 weeks. Most recently, GRM studio was updated on October 18, 2026 and BAM on October 30, 2026.

---

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