# Lost World vs EqX

The clearest difference is update cadence: EqX at every 8 days against Lost World's every 36 months. EqX also leads on review sentiment (100% vs 77%) and monetization model (ad-supported vs free with in-app purchases). On price, ads, in-app purchases and device support there is nothing between them.

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

Lost World ships an update every 36 months, EqX every 8 days. The most recent releases landed on October 22, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Lost World | EqX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (91 ratings)](https://appshunter.io/ios/app/lost-world-building/id1106404042/reviews)** | — |
| Number of ratings | **91** | — |
| Positive reviews | 76.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 36 months | **Every 8 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 14 MB | 29 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [学英 金](https://appshunter.io/developer/892387020) | [Nithin Cherian](https://appshunter.io/developer/1753225725) |

## What reviewers say

### Lost World

[App page](https://appshunter.io/ios/app/lost-world-building/id1106404042)

A simple sandbox game where you can build anything in an infinite world. Explore by walking or flying. Enjoy creative freedom in this open-ended building experience.

**Highlights:** Build anything, Infinite world, Walk and fly mechanics, Sandbox gameplay, Creative freedom

**Features:** macOS Compatibility

**In-app purchases:** none


### EqX

[App page](https://appshunter.io/ios/app/eqx-brain-training-math-game/id6739735556)

This app offers a challenging math puzzle adventure for all ages. Build formulas, hit target numbers, and test your skills with a variety of levels and operators. It's designed to sharpen math skills and provide a fun mental workout.

**Highlights:** Formula building, Target number challenges, Interactive keypad with advanced operators, Progressive difficulty levels, Achievements and leaderboards, Real-time feedback

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lost World free?

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

### Is EqX free?

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

### Do Lost World or EqX have ads?

Both Lost World and EqX show ads.

### Which is updated more often, Lost World or EqX?

Lost World ships an update every 36 months, and EqX every 8 days. Most recently, Lost World was updated on October 22, 2026 and EqX on October 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.*