# Encyclopedia of Outer Space vs Tavi

The clearest difference is review sentiment: Tavi at 100% against Encyclopedia of Outer Space's 0%. Tavi also leads on rating (5.0 vs 4.6). Encyclopedia of Outer Space's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Encyclopedia of Outer Space sells 3 in-app purchases, starting at $2.99 per month and Tavi sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Tavi holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 13 and 6 respectively. Written reviews point the same way: 0% of Encyclopedia of Outer Space's written reviews are positive against 100% of Tavi's.

Encyclopedia of Outer Space ships an update every 5 days, Tavi weekly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Encyclopedia of Outer Space | Tavi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (13 ratings)](https://appshunter.io/ios/app/encyclopedia-of-outer-space/id1122571537/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/tavi-language-learning/id6760904438/reviews)** |
| Number of ratings | **13** | 6 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 644 MB | 13 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [DYLAN,HALE MAKI DROP](https://appshunter.io/developer/1886724847) |

## What reviewers say

### Encyclopedia of Outer Space

[App page](https://appshunter.io/ios/app/encyclopedia-of-outer-space/id1122571537)

An offline encyclopedia with thousands of articles and HD photos covering all aspects of outer space. Earn badges for reading and explore topics from A-Z with a simple, elegant interface.

**Highlights:** Thousands of articles and HD photos, Comprehensive outer space information, Simple organization and UI, Offline access, Badge collection for reading, Available on iPhone and iPad

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $19.99 | per year |
| Full Version | $9.99 | one-time |


### Tavi

[App page](https://appshunter.io/ios/app/tavi-language-learning/id6760904438)

Engage in real conversations with AI tutors to learn languages. This app offers personalized lessons based on your level, using various real-world content like news and photos. Track your progress and stay motivated with daily streaks and rewards.

**Highlights:** AI-powered conversation practice, Personalized lessons, Photo and news-based learning, Custom text lessons, Progress tracking dashboard, Daily study streaks

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tavi Pro Monthly | $4.99 | per month |
| Tavi Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is Encyclopedia of Outer Space free?

Encyclopedia of Outer Space is free to download, with in-app purchases available.

### Is Tavi free?

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

### Which has better reviews, Encyclopedia of Outer Space or Tavi?

Tavi is rated higher. Encyclopedia of Outer Space averages 4.6 out of 5 from 13 ratings, while Tavi averages 5.0 from 6 ratings.

### Do Encyclopedia of Outer Space or Tavi have ads?

Neither Encyclopedia of Outer Space nor Tavi shows ads.

### Which is updated more often, Encyclopedia of Outer Space or Tavi?

Encyclopedia of Outer Space ships an update every 5 days, and Tavi weekly. Most recently, Encyclopedia of Outer Space was updated on November 2, 2026 and Tavi on October 31, 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.*