# Khmer Physic Formulas vs RYL Circle

The clearest difference is in-app purchases: Khmer Physic Formulas at none against RYL Circle's 1. Khmer Physic Formulas also leads on iOS requirement (12.0 vs 15.1). RYL Circle's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 19 months). On price and device support there is nothing between them.

Both are free to download. RYL Circle sells 1 one-off in-app purchase. Khmer Physic Formulas asks for nothing beyond the download.

Khmer Physic Formulas ships an update every 19 months, RYL Circle every 6 weeks. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Khmer Physic Formulas | RYL Circle |
| --- | --- | --- |
| 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** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 6 weeks** |
| Monetization | Ad-supported | — |
| Size | 62 MB | 53 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Cheab Kunthea](https://appshunter.io/developer/1073035288) | [Mohammad Hasan](https://appshunter.io/developer/1840610284) |

## 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


### RYL Circle

[App page](https://appshunter.io/ios/app/ryl-circle/id6756925492)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Energy Healing - Basic Package | $49.99 | one-time |


## Frequently asked questions

### Is Khmer Physic Formulas free?

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

### Is RYL Circle free?

RYL Circle is free to download, with in-app purchases available.

### Do Khmer Physic Formulas or RYL Circle have ads?

Khmer Physic Formulas shows ads; RYL Circle does not.

### Which is updated more often, Khmer Physic Formulas or RYL Circle?

Khmer Physic Formulas ships an update every 19 months, and RYL Circle every 6 weeks. Most recently, Khmer Physic Formulas was updated on October 5, 2026 and RYL Circle on September 26, 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.*