# Khmer Physic Formulas vs Mekong Science

The clearest difference is ads: Mekong Science at none against Khmer Physic Formulas's shown. Mekong Science also leads on update cadence (every 2 months vs every 19 months). Khmer Physic Formulas's advantage is iOS requirement (12.0 vs 16.4). On price, in-app purchases and device support 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, Mekong Science every 2 months. The most recent releases landed on September 21, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Khmer Physic Formulas | Mekong Science |
| --- | --- | --- |
| 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 2 months** |
| Monetization | Ad-supported | — |
| Size | 62 MB | 56 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cheab Kunthea](https://appshunter.io/developer/1073035288) | [Ya Visal Yin](https://appshunter.io/developer/1777728432) |

## 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


### Mekong Science

[App page](https://appshunter.io/ios/app/mekong-science/id6737747582)

**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 Mekong Science free?

Mekong Science is free to download, with no in-app purchases.

### Do Khmer Physic Formulas or Mekong Science have ads?

Khmer Physic Formulas shows ads; Mekong Science does not.

### Which is updated more often, Khmer Physic Formulas or Mekong Science?

Khmer Physic Formulas ships an update every 19 months, and Mekong Science every 2 months. Most recently, Khmer Physic Formulas was updated on September 21, 2026 and Mekong Science on September 15, 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.*