# HKDSE Physics Practice & Notes vs Sayo Academy

The clearest difference is update cadence: HKDSE Physics Practice & Notes at every 3 days against Sayo Academy's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. HKDSE Physics Practice & Notes sells 4 in-app purchases, starting at $8.99 per month and Sayo Academy sells 4 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

HKDSE Physics Practice & Notes ships an update every 3 days, Sayo Academy every 2 weeks. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | HKDSE Physics Practice & Notes | Sayo Academy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Size | 145 MB | 13 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pickmy AI](https://appshunter.io/developer/1869516043) | [Applied Artificial Intelligence Laboratory](https://appshunter.io/developer/1699167538) |

## What reviewers say

### HKDSE Physics Practice & Notes

[App page](https://appshunter.io/ios/app/hkdse-physics-practice-and-notes/id6781737430)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DSE Physics Pro | $8.99 | per month |
| 180日 Pro 全功能 | $19.99 | one-time |
| 90日 Pro 全功能 | $19.99 | one-time |
| Pro 90天優惠 | $19.99 | one-time |


### Sayo Academy

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

**Features:** macOS Compatibility, Apple Wallet, 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 |


## Frequently asked questions

### Is HKDSE Physics Practice & Notes free?

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

### Is Sayo Academy free?

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

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

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

### Which is updated more often, HKDSE Physics Practice & Notes or Sayo Academy?

HKDSE Physics Practice & Notes ships an update every 3 days, and Sayo Academy every 2 weeks. Most recently, HKDSE Physics Practice & Notes was updated on November 5, 2026 and Sayo Academy on November 6, 2026.

---

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