# Piano Chord Scales for compose vs SPL Reference

The clearest difference is ads: SPL Reference at none against Piano Chord Scales for compose's shown. SPL Reference also leads on update cadence (every 2 weeks vs every 5 weeks). Piano Chord Scales for compose's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. Piano Chord Scales for compose sells 1 one-off in-app purchase and SPL Reference sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Piano Chord Scales for compose ships an update every 5 weeks, SPL Reference every 2 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Piano Chord Scales for compose | SPL Reference |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 6 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [kenji kiuchi](https://appshunter.io/developer/553473005) | [Direct Sound Records Ltd](https://appshunter.io/developer/1896279797) |

## What reviewers say

### Piano Chord Scales for compose

[App page](https://appshunter.io/ios/app/piano-chord-scales-for-compose/id1210254338)

Easily check piano chords with a comprehensive list and a memory function to save favorites. Play and hear the chords directly on the virtual piano. Expand your saving capacity with an in-app purchase.

**Highlights:** Chord list lookup, Save favorite chords, Play chord sounds, Adjustable sound octaves, Edit and delete saved chords, Expandable memory slots

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad & all functions. | $6.99 | one-time |


### SPL Reference

[App page](https://appshunter.io/ios/app/spl-reference/id6806757498)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Professional Unlock | $39.99 | one-time |


## Frequently asked questions

### Is Piano Chord Scales for compose free?

Piano Chord Scales for compose is free to download, with in-app purchases available.

### Is SPL Reference free?

SPL Reference is free to download, with in-app purchases available.

### Do Piano Chord Scales for compose or SPL Reference have ads?

Piano Chord Scales for compose shows ads; SPL Reference does not.

### Which is updated more often, Piano Chord Scales for compose or SPL Reference?

Piano Chord Scales for compose ships an update every 5 weeks, and SPL Reference every 2 weeks. Most recently, Piano Chord Scales for compose was updated on November 2, 2026 and SPL Reference on October 31, 2026.

---

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