# Physics vs Eva & Bob

The clearest difference is in-app purchases: Eva & Bob at none against Physics's 4. Eva & Bob also leads on device support (3 vs 1) and iOS requirement (15.5 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Physics sells 4 in-app purchases, starting at $1.99 per month. Eva & Bob asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Physics | Eva & Bob |
| --- | --- | --- |
| Price | Free | Free |
| 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 | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 68 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nikita Chernykh](https://appshunter.io/developer/1448243728) | [Etoiles Academy](https://appshunter.io/developer/1855582178) |

## 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 |


### Eva & Bob

[App page](https://appshunter.io/ios/app/eva-and-bob/id6755689666)

**In-app purchases:** none


## Frequently asked questions

### Is Physics free?

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

### Is Eva & Bob free?

Eva & Bob is free to download, with no in-app purchases.

### Do Physics or Eva & Bob have ads?

Neither Physics nor Eva & Bob shows ads.

### Which is updated more often, Physics or Eva & Bob?

Physics ships an update every 2 months, and Eva & Bob every 2 months. Most recently, Physics was updated on October 29, 2026 and Eva & Bob on October 28, 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.*