# TTCApp by TTCA vs HKDSE Math Practice & Notes

The clearest difference is in-app purchases: TTCApp by TTCA at none against HKDSE Math Practice & Notes's 3. HKDSE Math Practice & Notes's advantage is iOS requirement (15.6 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. HKDSE Math Practice & Notes sells 3 one-off in-app purchases. TTCApp by TTCA asks for nothing beyond the download.

TTCApp by TTCA ships an update every 5 days, HKDSE Math Practice & Notes every 4 days. Both last shipped on November 13, 2026.

## The numbers

| Metric | TTCApp by TTCA | HKDSE Math Practice & Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Size | 15 MB | 173 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuk Man Ng](https://appshunter.io/developer/1882958112) | [Pickmy AI](https://appshunter.io/developer/1869516043) |

## What reviewers say

### TTCApp by TTCA

[App page](https://appshunter.io/ios/app/ttcapp-by-ttca/id6761507305)

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

**In-app purchases:** none


### 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 (3)**

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


## Frequently asked questions

### Is TTCApp by TTCA free?

TTCApp by TTCA is free to download, with no in-app purchases.

### Is HKDSE Math Practice & Notes free?

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

### Do TTCApp by TTCA or HKDSE Math Practice & Notes have ads?

Neither TTCApp by TTCA nor HKDSE Math Practice & Notes shows ads.

### Which is updated more often, TTCApp by TTCA or HKDSE Math Practice & Notes?

TTCApp by TTCA ships an update every 5 days, and HKDSE Math Practice & Notes every 4 days. Most recently, TTCApp by TTCA was updated on November 13, 2026 and HKDSE Math Practice & Notes on November 13, 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.*