# NTK SAT Chemistry vs IGCSE Physics Notes

The clearest difference is update cadence: IGCSE Physics Notes at every 10 days against NTK SAT Chemistry's every 2 months. NTK SAT Chemistry's advantage is iOS requirement (8.0 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. NTK SAT Chemistry sells 4 one-off in-app purchases and IGCSE Physics Notes sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

NTK SAT Chemistry ships an update every 2 months, IGCSE Physics Notes every 10 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NTK SAT Chemistry | IGCSE Physics Notes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Size | 38 MB | 43 MB |
| Requires iOS | **8.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NTK Academic Group](https://appshunter.io/developer/635797342) | [Hareendra Dhanushka Bandara Jayasingha Gamage](https://appshunter.io/developer/1718176438) |

## What reviewers say

### NTK SAT Chemistry

[App page](https://appshunter.io/ios/app/ntk-sat-chemistry/id1123532720)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SAT Chemistry Set 2 | $0.99 | one-time |
| SAT Chemistry Set 3 | $0.99 | one-time |
| SAT Chemistry Set 4 | $0.99 | one-time |
| SAT Chemistry Set 5 | $0.99 | one-time |


### IGCSE Physics Notes

[App page](https://appshunter.io/ios/app/igcse-physics-notes/id6776675569)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $9.99 | per month |
| 6 Month Premium | $44.99 | per 6 months |
| Annual Premium | $69.99 | per year |


## Frequently asked questions

### Is NTK SAT Chemistry free?

NTK SAT Chemistry is free to download, with in-app purchases available.

### Is IGCSE Physics Notes free?

IGCSE Physics Notes is free to download, with in-app purchases available.

### Do NTK SAT Chemistry or IGCSE Physics Notes have ads?

Neither NTK SAT Chemistry nor IGCSE Physics Notes shows ads.

### Which is updated more often, NTK SAT Chemistry or IGCSE Physics Notes?

NTK SAT Chemistry ships an update every 2 months, and IGCSE Physics Notes every 10 days. Most recently, NTK SAT Chemistry was updated on October 13, 2026 and IGCSE Physics Notes on October 24, 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.*