# Gravity by Vaonis vs Einstein Recall

The clearest difference is review sentiment: Einstein Recall at 100% against Gravity by Vaonis's 48%. Einstein Recall also leads on rating (5.0 vs 2.7) and update cadence (every 2 weeks vs every 2 months). Gravity by Vaonis's advantage is ads (none vs shown) and ratings volume (49 vs 2). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Einstein Recall holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: Gravity by Vaonis has 49 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 48% of Gravity by Vaonis's written reviews are positive against 100% of Einstein Recall's.

Gravity by Vaonis ships an update every 2 months, Einstein Recall every 2 weeks. The most recent releases landed on September 24, 2026 and June 23, 2026 respectively.

## The numbers

| Metric | Gravity by Vaonis | Einstein Recall |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (49 ratings)](https://appshunter.io/ios/app/gravity-by-vaonis/id6469513708/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/einstein-recall/id6746659104/reviews)** |
| Number of ratings | **49** | 2 |
| Positive reviews | 47.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 331 MB | 15 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Vaonis](https://appshunter.io/developer/1369139518) | [Scott Collins](https://appshunter.io/developer/1757164581) |

## What reviewers say

### Gravity by Vaonis

[App page](https://appshunter.io/ios/app/gravity-by-vaonis/id6469513708)

Transform your smartphone into a smart telescope to explore the cosmos. Capture stunning images of galaxies, nebulae, and star clusters with advanced image stacking. Observe the Sun and Moon with dedicated modes and educational content.

**Highlights:** Smartphone as smart telescope, 25x optical zoom, Live image stacking, Sun and Moon observation, Deep sky object photography, Landscape and wildlife photography, Educational cosmic content

**In-app purchases:** none


### Einstein Recall

[App page](https://appshunter.io/ios/app/einstein-recall/id6746659104)

This app helps you retain more of what you read by using spaced repetition. It automatically schedules reviews and allows you to create memory cards from any content with a single tap. Build lasting knowledge with minimal daily effort.

**Highlights:** Auto-scheduled reviews, Instant memory card creation, AI-powered card generation, Image and screenshot analysis, Organize cards into folders, Streak tracking, Daily reminders

**In-app purchases:** none


## Frequently asked questions

### Is Gravity by Vaonis free?

Gravity by Vaonis is free to download, with no in-app purchases.

### Is Einstein Recall free?

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

### Which has better reviews, Gravity by Vaonis or Einstein Recall?

Einstein Recall is rated higher. Gravity by Vaonis averages 2.7 out of 5 from 49 ratings, while Einstein Recall averages 5.0 from 2 ratings.

### Do Gravity by Vaonis or Einstein Recall have ads?

Einstein Recall shows ads; Gravity by Vaonis does not.

### Which is updated more often, Gravity by Vaonis or Einstein Recall?

Gravity by Vaonis ships an update every 2 months, and Einstein Recall every 2 weeks. Most recently, Gravity by Vaonis was updated on September 24, 2026 and Einstein Recall on June 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*