OnKey vs Multi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OnKey
This app generates readable, note-based exercises for practicing scales and chords. It's ideal for musicians of all levels looking for a focused and efficient way to improve their technique and theory knowledge without manual preparation.
- Generate note-based exercises
- Select scale or chord type
- Transpose to any key
- Set range and clef
- Choose from various patterns
- Add note names and time signatures
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OnKey Scale Practice is a simple, effective tool that helps musicians practice scales and chords with clarity and focus. Just enter your preferences and instantly generate readable, note-based exercises—no more flipping through books or writing them out by hand. Perfect for warm-ups, technique drills, or theory work, whether you're a beginner or an advanced player. Features: Select your scale or chord type Transpose to any key Set your range and clef Choose from various patterns Add note names and time signatures Designed for flexibility. Built for clarity. For all instruments.
Multi
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As an artist and musician, it can sometimes be difficult to capture that great idea. Complex recording equipment and software can take you out of the moment. Multi-Tracker is a minimalist, close-at-hand tool for recording, mixing, and mastering music and audio. Use your connected audio equipment, or the microphone, speaker, and headphones on your device, to create beautifully layered multi-track audio recordings. Add equalization, reverb, delay, compressor, and limiter, then master (render) your mix to a stereo audio file for sharing and distribution.
Screenshots
Verdict
The clearest difference is price: OnKey at $4.99 against Multi's $9.99. OnKey also leads on iOS requirement (14.1 vs 18.1). On update cadence, ads, in-app purchases and device support 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
OnKey costs $4.99 and Multi $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | OnKey | Multi |
|---|---|---|
| Price | $4.99 — better | $9.99 |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 18.1 |
| Further details — not scored | ||
| Size | 2 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Rea Meir | Engineered Stuff |
In-app purchases
OnKey
No in-app purchases
Multi
No in-app purchases









