# Bitsby vs Decipher Physics

The clearest difference is iOS requirement: Bitsby at 13.0 against Decipher Physics's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 5, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Bitsby | Decipher Physics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 10 MB | 48 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Planetbeyond](https://appshunter.io/developer/1463932388) | [Alexander Lione](https://appshunter.io/developer/1843340454) |

## What reviewers say

### Bitsby

[App page](https://appshunter.io/ios/app/bitsby-gcse-cs-chatbot/id1491437242)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decipher Physics

[App page](https://appshunter.io/ios/app/decipher-physics/id6754386558)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bitsby free?

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

### Is Decipher Physics free?

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

### Do Bitsby or Decipher Physics have ads?

Neither Bitsby nor Decipher Physics shows ads.

### Which is updated more often, Bitsby or Decipher Physics?

Bitsby ships an update monthly, and Decipher Physics monthly. Most recently, Bitsby was updated on October 5, 2026 and Decipher Physics on September 18, 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.*