# PNO Book vs SightSage

The clearest difference is in-app purchases: PNO Book at none against SightSage's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SightSage sells 1 one-off in-app purchase. PNO Book asks for nothing beyond the download.

PNO Book ships an update weekly, SightSage every 10 days. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | PNO Book | SightSage |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sightsage/id6763661923/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | — | Freemium |
| Size | 58 MB | 41 MB |
| Requires iOS | **14.0.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Reginald Watkins](https://appshunter.io/developer/1774881490) | [Martin Kemeny](https://appshunter.io/developer/1895423979) |

## What reviewers say

### PNO Book

[App page](https://appshunter.io/ios/app/pno-book/id6743553403)

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

**In-app purchases:** none


### SightSage

[App page](https://appshunter.io/ios/app/sightsage/id6763661923)

This music flashcard trainer helps musicians improve their sight-reading skills. It offers customizable quizzes for notes, chords, and their positions on a piano staff. Suitable for all levels, from beginners to advanced players.

**Highlights:** Note and chord recognition, Staff notation to piano key mapping, Customizable quiz combinations, Beginner to advanced levels, Full library access with Pro, One-time purchase for Pro

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SageSight Pro | $3.99 | one-time |


## Frequently asked questions

### Is PNO Book free?

PNO Book is free to download, with no in-app purchases.

### Is SightSage free?

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

### Do PNO Book or SightSage have ads?

Neither PNO Book nor SightSage shows ads.

### Which is updated more often, PNO Book or SightSage?

PNO Book ships an update weekly, and SightSage every 10 days. Most recently, PNO Book was updated on October 11, 2026 and SightSage on October 2, 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.*