# Physics AI vs Astral Memory

The clearest difference is ads: Astral Memory at none against Physics AI's shown. Astral Memory also leads on update cadence (daily vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Physics AI sells 2 in-app purchases, starting at $5.99 per 7 days and Astral Memory sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Physics AI ships an update fortnightly, Astral Memory daily. The most recent releases landed on August 22, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Physics AI | Astral Memory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (288 ratings)](https://appshunter.io/ios/app/physics-ai-problem-solver/id6474350204/reviews)** | — |
| Number of ratings | **288** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Subscription | — |
| Size | 16 MB | 2 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Renaissance Apps LLC](https://appshunter.io/developer/1220536592) | [Robert Patrick Tiernan](https://appshunter.io/developer/1835267973) |

## What reviewers say

### Physics AI

[App page](https://appshunter.io/ios/app/physics-ai-problem-solver/id6474350204)

This app acts as a physics problem solver, offering step-by-step solutions for various physics questions. Users can upload or photograph problems, including diagrams and handwritten notes, to receive detailed mathematical explanations. It covers a wide range of physics topics for students at all levels.

**Highlights:** Photo upload for physics problems, Step-by-step mathematical solutions, Covers high school to doctoral research, Copy and share solutions, Handles multiple choice, word-based, and diagram problems

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Physics AI Weekly Sub | $5.99 | per 7 days |
| Physics AI - Yearly Sub | $34.99 | per year |


### Astral Memory

[App page](https://appshunter.io/ios/app/astral-memory/id6754609998)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Astral Memory Premium (Monthly) | $2.99 | per month |


## Frequently asked questions

### Is Physics AI free?

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

### Is Astral Memory free?

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

### Do Physics AI or Astral Memory have ads?

Physics AI shows ads; Astral Memory does not.

### Which is updated more often, Physics AI or Astral Memory?

Physics AI ships an update fortnightly, and Astral Memory daily. Most recently, Physics AI was updated on August 22, 2026 and Astral Memory on June 1, 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.*