# Just a Line vs Eulerian

The clearest difference is ads: Eulerian at none against Just a Line's shown. Eulerian also leads on update cadence (every 3 weeks vs every 54 months). Just a Line's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Just a Line sells 7 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.

Just a Line ships an update every 54 months, Eulerian every 3 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Just a Line | Eulerian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (49 ratings)](https://appshunter.io/ios/app/just-a-line-one-line-puzzle/id1316876503/reviews)** | — |
| Number of ratings | **49** | — |
| Positive reviews | 82.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 54 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 89 MB | 19 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thang Vu](https://appshunter.io/developer/1269408753) | [Madhav Dogra](https://appshunter.io/developer/1866043950) |

## What reviewers say

### Just a Line

[App page](https://appshunter.io/ios/app/just-a-line-one-line-puzzle/id1316876503)

A brain-training puzzle game where you draw shapes and contours without lifting your finger or retracing lines. It offers numerous challenging levels to test your logic and concentration.

**Highlights:** Draw shapes without lifting finger, No retracing lines, Numerous challenging levels, Improves memory and concentration, Enhances logical thinking

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 stars | $0.99 | one-time |
| 20 stars | $1.99 | one-time |
| 100 stars | $3.99 | one-time |
| Remove Ads | $4.99 | one-time |
| 500 stars | $7.99 | one-time |
| 1000 stars | $15.99 | one-time |
| 5000 stars | $29.99 | 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 Just a Line free?

Just a Line is free to download, with in-app purchases available.

### Is Eulerian free?

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

### Do Just a Line or Eulerian have ads?

Just a Line shows ads; Eulerian does not.

### Which is updated more often, Just a Line or Eulerian?

Just a Line ships an update every 54 months, and Eulerian every 3 weeks. Most recently, Just a Line was updated on October 23, 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.*