# MIDI Opener vs TempCalc

The clearest difference is in-app purchases: TempCalc at none against MIDI Opener's 13. TempCalc also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MIDI Opener sells 13 one-off in-app purchases. TempCalc asks for nothing beyond the download.

MIDI Opener ships an update every 6 days, TempCalc weekly. The most recent releases landed on October 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | MIDI Opener | TempCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (86 ratings)](https://appshunter.io/ios/app/midi-opener/id1029373282/reviews)** | — |
| Number of ratings | **86** | — |
| Positive reviews | 64.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 334 MB | 19 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MartianRover](https://appshunter.io/developer/1282183383) | [Jesus Alcaraz Gomez](https://appshunter.io/developer/1820891100) |

## What reviewers say

### MIDI Opener

[App page](https://appshunter.io/ios/app/midi-opener/id1029373282)

This app is a powerful and modern MIDI player designed for musicians, learners, and creators. It offers visual playback, tempo and key control, and advanced track management. Import custom soundbanks and enjoy features like synchronized lyrics and a 3D visualizer.

**Highlights:** Visual MIDI playback, Tempo and key control, Advanced track controls, 128 General MIDI instruments, Built-in effects, Custom soundbanks, Synchronized lyrics, 3D visualizer

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip | $0.99 | one-time |
| Full Upgrade Discount | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Change Tempo | $1.99 | one-time |
| Change Tempo and Key | $1.99 | one-time |
| All Access Upgrade | $2.99 | one-time |
| Track Controls | $2.99 | one-time |
| Super Tip | $4.99 | one-time |
| MIDI Out | $4.99 | one-time |
| Practice Pack | $4.99 | one-time |
| Full Upgrade | $4.99 | one-time |
| Premium Upgrade | $4.99 | one-time |
| All Access | $7.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🎶 Good sounding instruments
- 🚀 Handles instrument changes well
- ✨ Free to use
- ✅ Plays MIDI files effectively

**What reviewers complain about**

- 🐛 Crashes when changing SoundFonts (iOS 26)
- 🐛 Cuts off beginning of songs
- 🐛 Sustained notes treated as staccato
- 💸 Charging for basic features
- 📉 Poor sound quality for some instruments

**Reported bugs**

- Sustained notes are treated as staccato notes.
- Cuts off the beginning of the song.
- Kicked out of the app when clicking on another SoundFont.
- Crashes when changing SoundFonts (iOS 26).
- Bass drum is too quiet for metal music.

**Requested features**

- Adjust individual track volumes
- Zoom in/out
- Select region to play
- Export features (WAV, MP3, FLAC)
- Playlist functionality


### TempCalc

[App page](https://appshunter.io/ios/app/tempcalc/id6761309973)

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

**In-app purchases:** none


## Frequently asked questions

### Is MIDI Opener free?

MIDI Opener is free to download, with in-app purchases available.

### Is TempCalc free?

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

### Do MIDI Opener or TempCalc have ads?

Neither MIDI Opener nor TempCalc shows ads.

### Which is updated more often, MIDI Opener or TempCalc?

MIDI Opener ships an update every 6 days, and TempCalc weekly. Most recently, MIDI Opener was updated on October 22, 2026 and TempCalc on September 18, 2026.

---

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