# IconRefresh vs Physics Lessons,Topics

The clearest difference is in-app purchases: IconRefresh at none against Physics Lessons,Topics's 4. IconRefresh also leads on ads (none vs shown). Physics Lessons,Topics's advantage is iOS requirement (12.0 vs 15.4). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Physics Lessons,Topics sells 4 in-app purchases, starting at $4.99 per 7 days. IconRefresh asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for IconRefresh against 5.0 for Physics Lessons,Topics. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

IconRefresh ships an update every 3 months, Physics Lessons,Topics every 2 months. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | IconRefresh | Physics Lessons,Topics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/iconrefresh/id6471902392/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/physics-lessonstopics/id6751053588/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 66 MB | 39 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ralf Westphal](https://appshunter.io/developer/1617511790) | [Ali Umer](https://appshunter.io/developer/1584417594) |

## What reviewers say

### IconRefresh

[App page](https://appshunter.io/ios/app/iconrefresh/id6471902392)

This app helps retain learned information by sending personalized challenge questions after training. It aims to combat the forgetting curve, ensuring long-term memory retention through regular engagement.

**Highlights:** Spaced repetition for memory recall, Personalized challenge questions, Combats the forgetting curve, Post-training engagement, Customizable refresh frequency

**In-app purchases:** none


### Physics Lessons,Topics

[App page](https://appshunter.io/ios/app/physics-lessonstopics/id6751053588)

Master physics concepts with this comprehensive study companion. It offers detailed definitions, step-by-step explanations, formulas, quizzes, and flashcards for over 200 topics. Learn at your own pace, track progress, and study offline.

**Highlights:** 200+ physics topics covered, Detailed definitions and explanations, Practice quizzes with instant feedback, Flashcards for efficient memorization, Progress tracking, Offline access

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Physics Lessons | $4.99 | per 7 days |
| Physics Lessons | $6.99 | per month |
| Physics Lessons | $29.99 | per year |
| Physics Lessons | $49.99 | one-time |


## Frequently asked questions

### Is IconRefresh free?

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

### Is Physics Lessons,Topics free?

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

### Which has better reviews, IconRefresh or Physics Lessons,Topics?

IconRefresh and Physics Lessons,Topics are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do IconRefresh or Physics Lessons,Topics have ads?

Physics Lessons,Topics shows ads; IconRefresh does not.

### Which is updated more often, IconRefresh or Physics Lessons,Topics?

IconRefresh ships an update every 3 months, and Physics Lessons,Topics every 2 months. Most recently, IconRefresh was updated on October 9, 2026 and Physics Lessons,Topics on September 30, 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.*