# Khmer Physic Formulas vs NGS PA

The clearest difference is ads: NGS PA at none against Khmer Physic Formulas's shown. NGS PA also leads on update cadence (every 10 days vs every 19 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Khmer Physic Formulas ships an update every 19 months, NGS PA every 10 days. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Khmer Physic Formulas | NGS PA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (15 ratings)](https://appshunter.io/ios/app/khmer-physic-formulas/id1076144702/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 10 days** |
| Monetization | Ad-supported | — |
| Size | 62 MB | 94 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cheab Kunthea](https://appshunter.io/developer/1073035288) | [SCHOOL LINK CO., LTD.](https://appshunter.io/developer/1780487159) |

## What reviewers say

### Khmer Physic Formulas

[App page](https://appshunter.io/ios/app/khmer-physic-formulas/id1076144702)

Access a comprehensive collection of physics formulas for various grade levels and specialized fields. This app offers a simple, fast, and smooth user interface for easy formula lookup.

**Highlights:** Physics formulas for grades 7-12, Engineering physics formulas, Basic physics formulas, SI Units and constants, Formula symbol reference, Simple and fast UI

**Features:** macOS Compatibility

**In-app purchases:** none


### NGS PA

[App page](https://appshunter.io/ios/app/ngs-pa/id6738906360)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Khmer Physic Formulas free?

Khmer Physic Formulas is free to download, with no in-app purchases.

### Is NGS PA free?

NGS PA is free to download, with no in-app purchases.

### Do Khmer Physic Formulas or NGS PA have ads?

Khmer Physic Formulas shows ads; NGS PA does not.

### Which is updated more often, Khmer Physic Formulas or NGS PA?

Khmer Physic Formulas ships an update every 19 months, and NGS PA every 10 days. Most recently, Khmer Physic Formulas was updated on October 21, 2026 and NGS PA on October 7, 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.*