Instrument Classification vs KeyConfig
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Instrument Classification
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Classifying instruments by sound #Plucked string #Brass #Wind #Bowed string #Rattle #instruments
KeyConfig
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Configure parameters for Bluetooth Low Energy devices via Bluetooth.
Screenshots
Verdict
The clearest difference is ads: KeyConfig at none against Instrument Classification's shown. Instrument Classification's advantage is update cadence (every 2 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.
Instrument Classification ships an update every 2 weeks, KeyConfig every 2 months. Both last shipped on September 24, 2026.
| Parameter | Instrument Classification | KeyConfig |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.8.3 | 15.6 — better |
| Further details — not scored | ||
| Size | 43 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideaki Uchikoshi | SHENZHEN KEYKING TECHNOLOGY CO.,LTD. |
In-app purchases
Instrument Classification
No in-app purchases
KeyConfig
No in-app purchases
Questions
Is Instrument Classification free?
Is KeyConfig free?
Do Instrument Classification or KeyConfig have ads?
Which is updated more often, Instrument Classification or KeyConfig?
Other comparisons
