# Instrument Identification vs Mojenn DeckCheck

The clearest difference is in-app purchases: Instrument Identification at none against Mojenn DeckCheck's 1. Instrument Identification also leads on update cadence (every 2 weeks vs every 6 weeks) and device support (3 vs 1). Mojenn DeckCheck's advantage is ads (none vs shown). On price there is nothing between them.

Both are free to download. Mojenn DeckCheck sells 1 one-off in-app purchase. Instrument Identification asks for nothing beyond the download.

Instrument Identification ships an update every 2 weeks, Mojenn DeckCheck every 6 weeks. The most recent releases landed on September 23, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Instrument Identification | Mojenn DeckCheck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/instrument-identification/id6737651815/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Ad-supported | — |
| Size | 36 MB | 48 MB |
| Requires iOS | **15.8.3** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [Mojenn LLC](https://appshunter.io/developer/1857285735) |

## What reviewers say

### Instrument Identification

[App page](https://appshunter.io/ios/app/instrument-identification/id6737651815)

This utility app helps you identify musical instruments by analyzing the sounds they produce. It currently supports a range of common instruments like guitar, piano, and trumpet.

**Highlights:** Identify instruments by sound, Supports guitar, piano, organ, Supports trumpet, trombone, violin, Supports cello, clarinet, harp

**Features:** macOS Compatibility

**In-app purchases:** none


### Mojenn DeckCheck

[App page](https://appshunter.io/ios/app/mojenn-deckcheck/id6761127495)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DeckCheck Forever | $0.99 | one-time |


## Frequently asked questions

### Is Instrument Identification free?

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

### Is Mojenn DeckCheck free?

Mojenn DeckCheck is free to download, with in-app purchases available.

### Do Instrument Identification or Mojenn DeckCheck have ads?

Instrument Identification shows ads; Mojenn DeckCheck does not.

### Which is updated more often, Instrument Identification or Mojenn DeckCheck?

Instrument Identification ships an update every 2 weeks, and Mojenn DeckCheck every 6 weeks. Most recently, Instrument Identification was updated on September 23, 2026 and Mojenn DeckCheck on October 8, 2026.

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