Instrument Identification vs Mojenn DeckCheck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Instrument Identification
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.
- Identify instruments by sound
- Supports guitar, piano, organ
- Supports trumpet, trombone, violin
- Supports cello, clarinet, harp
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Identifying instruments from the sounds they play *Instruments to identify: guitar, piano, organ, trumpet, trombone, violin, cello, clarinet, harp
Mojenn DeckCheck
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DeckCheck is a fast playing card scanner that verifies that no cards are missing from your 52-card English pattern decks (i.e. J, Q, K, A). Simply spread the cards on the table and point your camera at them!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Instrument Identification | Mojenn DeckCheck |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks — better | Every 6 weeks |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.8.3 — better | 26.0 |
| Further details — not scored | ||
| Size | 36 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideaki Uchikoshi | Mojenn LLC |
In-app purchases
Instrument Identification
No in-app purchases
Mojenn DeckCheck
- DeckCheck Forever$0.99
Questions
Is Instrument Identification free?
Is Mojenn DeckCheck free?
Do Instrument Identification or Mojenn DeckCheck have ads?
Which is updated more often, Instrument Identification or Mojenn DeckCheck?
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