# Physical Constants vs ATomicall

The clearest difference is ads: ATomicall at none against Physical Constants's shown. ATomicall also leads on update cadence (every 3 weeks vs every 9 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.

Physical Constants ships an update every 9 months, ATomicall every 3 weeks. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Physical Constants | ATomicall |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/physical-constants-ml/id837679891/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 25 MB | 128 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Ishikawa](https://appshunter.io/developer/468311118) | [In2Bit GbR](https://appshunter.io/developer/1605641792) |

## What reviewers say

### Physical Constants

[App page](https://appshunter.io/ios/app/physical-constants-ml/id837679891)

Access a comprehensive list of physical constants, organized by category for easy searching. This app supports all AppStore languages and allows users to report corrections via email.

**Highlights:** Physical constants database, Categorized by topic, Search functionality, Multi-language support, User feedback for corrections

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

**In-app purchases:** none


### ATomicall

[App page](https://appshunter.io/ios/app/atomicall/id1637400559)

**In-app purchases:** none


## Frequently asked questions

### Is Physical Constants free?

Physical Constants is free to download, with no in-app purchases.

### Is ATomicall free?

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

### Do Physical Constants or ATomicall have ads?

Physical Constants shows ads; ATomicall does not.

### Which is updated more often, Physical Constants or ATomicall?

Physical Constants ships an update every 9 months, and ATomicall every 3 weeks. Most recently, Physical Constants was updated on October 2, 2026 and ATomicall on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*