# Sayo Academy vs HKDSE Math Practice & Notes

Sayo Academy and HKDSE Math Practice & Notes are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Sayo Academy sells 4 in-app purchases, starting at $19.99 per month and HKDSE Math Practice & Notes sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Sayo Academy | HKDSE Math Practice & Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 10 MB | 182 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Applied Artificial Intelligence Laboratory](https://appshunter.io/developer/1699167538) | [Pickmy AI](https://appshunter.io/developer/1869516043) |

## What reviewers say

### Sayo Academy

[App page](https://appshunter.io/ios/app/sayo-academy/id6804576802)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic (Monthly) | $19.99 | per month |
| Pro (Monthly) | $59.99 | per month |
| Basic (Annual) | $179.99 | per year |
| Pro (Annual) | $539.99 | per year |


### HKDSE Math Practice & Notes

[App page](https://appshunter.io/ios/app/hkdse-math-practice-and-notes/id6809379110)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Pro 180 Days | $19.99 | one-time |
| Math Pro 90 Days | $19.99 | one-time |


## Frequently asked questions

### Is Sayo Academy free?

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

### Is HKDSE Math Practice & Notes free?

HKDSE Math Practice & Notes is free to download, with in-app purchases available.

### Do Sayo Academy or HKDSE Math Practice & Notes have ads?

Neither Sayo Academy nor HKDSE Math Practice & Notes shows ads.

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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.*