# Khmer Physic Formulas vs Writing Explanation

The clearest difference is ads: Writing Explanation at none against Khmer Physic Formulas's shown. Writing Explanation also leads on update cadence (every 2 weeks vs every 19 months) and monetization model (free vs ad-supported). Khmer Physic Formulas's advantage is rating (4.4 vs 4.0) and ratings volume (15 vs 3). 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 holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Khmer Physic Formulas has 15 ratings behind it against 3, so its average is the more settled of the two.

Khmer Physic Formulas ships an update every 19 months, Writing Explanation every 2 weeks. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Khmer Physic Formulas | Writing Explanation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (15 ratings)](https://appshunter.io/ios/app/khmer-physic-formulas/id1076144702/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/writing-explanation/id1458615232/reviews) |
| Number of ratings | **15** | 3 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 62 MB | 77 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cheab Kunthea](https://appshunter.io/developer/1073035288) | [Phanna PANG](https://appshunter.io/developer/1458265412) |

## 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


### Writing Explanation

[App page](https://appshunter.io/ios/app/writing-explanation/id1458615232)

This educational app provides a collection of essays designed to help students prepare for the Bac II Examination. Its user-friendly interface makes it easy to access and navigate study materials.

**Highlights:** Bac II Examination essay collection, Friendly user interface, Easy to use, iOS compatible

**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 Writing Explanation free?

Writing Explanation is free to download, with no in-app purchases.

### Which has better reviews, Khmer Physic Formulas or Writing Explanation?

Khmer Physic Formulas is rated higher. Khmer Physic Formulas averages 4.4 out of 5 from 15 ratings, while Writing Explanation averages 4.0 from 3 ratings.

### Do Khmer Physic Formulas or Writing Explanation have ads?

Khmer Physic Formulas shows ads; Writing Explanation does not.

### Which is updated more often, Khmer Physic Formulas or Writing Explanation?

Khmer Physic Formulas ships an update every 19 months, and Writing Explanation every 2 weeks. Most recently, Khmer Physic Formulas was updated on September 21, 2026 and Writing Explanation on June 1, 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.*