# Physics vs Stargazers Astronomy Guide

The clearest difference is price: Physics at Free against Stargazers Astronomy Guide's $4.99. Stargazers Astronomy Guide's advantage is in-app purchases (none vs 4). On ads, device support and iOS requirement there is nothing between them.

Physics is free to download; Stargazers Astronomy Guide costs $4.99 up front. Physics sells 4 in-app purchases, starting at $1.99 per month. Stargazers Astronomy Guide asks for nothing beyond the download.

## The numbers

| Metric | Physics | Stargazers Astronomy Guide |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.7 (20 ratings)](https://appshunter.io/ios/app/physics-formulas-2026/id1495587959/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 10 MB |
| Requires iOS | **17.0** | 18.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Nikita Chernykh](https://appshunter.io/developer/1448243728) | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) |

## What reviewers say

### Physics

[App page](https://appshunter.io/ios/app/physics-formulas-2026/id1495587959)

This interactive reference app provides a comprehensive collection of physics terms, formulas, and calculators. It's designed to help users prepare for tests and Olympiads by offering clear explanations, interactive tables, and internal search functionality.

**Highlights:** 280+ physics terms and definitions, 250+ categorized physics formulas, 180+ interactive calculators, Interactive tables for knowledge assimilation, Internal search for terms and formulas, Convenient in-app navigation

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional 1 Month | $1.99 | per month |
| Professional 6 Month | $6.99 | per 6 months |
| Professional 12 Month | $14.99 | per year |
| Professional - unlimited | $24.99 | one-time |


### Stargazers Astronomy Guide

[App page](https://appshunter.io/ios/app/stargazers-astronomy-guide/id6748083059)

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

**In-app purchases:** none


## Frequently asked questions

### Is Physics free?

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

### Is Stargazers Astronomy Guide free?

Stargazers Astronomy Guide costs $4.99, with no in-app purchases.

### Do Physics or Stargazers Astronomy Guide have ads?

Neither Physics nor Stargazers Astronomy Guide shows ads.

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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.*