# Orbi.go vs Eulerian

The clearest difference is iOS requirement: Orbi.go at 9.0 against Eulerian's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Orbi.go sells 2 one-off in-app purchases and Eulerian sells 9 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Orbi.go ships an update monthly, Eulerian every 3 weeks. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Orbi.go | Eulerian |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 19 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christoph Gogolin](https://appshunter.io/developer/511901280) | [Madhav Dogra](https://appshunter.io/developer/1866043950) |

## What reviewers say

### Orbi.go

[App page](https://appshunter.io/ios/app/orbigo-reach-the-center/id912140865)

A minimalistic, one-tap skill-based game where players guide an arrow towards the center while avoiding orbiting obstacles. Collect lives and compete for high scores.

**Highlights:** One-tap gameplay, Skill-based challenges, Obstacle avoidance, High score competition, Collectible lives

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Request support | $0.99 | one-time |
| Remove Ads | $1.99 | one-time |


### Eulerian

[App page](https://appshunter.io/ios/app/eulerian/id6760196420)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Endless Monthly | $3.99 | per month |
| 5 Hints | $0.99 | one-time |
| 15 Hints | $1.99 | one-time |
| All Premium Themes | $3.99 | one-time |
| Double Coins | $4.99 | one-time |
| Remove Ads | $4.99 | one-time |
| 50 Hints | $4.99 | one-time |
| 150 Hints | $9.99 | one-time |
| 500 Hints | $19.99 | one-time |


## Frequently asked questions

### Is Orbi.go free?

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

### Is Eulerian free?

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

### Do Orbi.go or Eulerian have ads?

Neither Orbi.go nor Eulerian shows ads.

### Which is updated more often, Orbi.go or Eulerian?

Orbi.go ships an update monthly, and Eulerian every 3 weeks. Most recently, Orbi.go was updated on October 7, 2026 and Eulerian on October 25, 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.*