# Tri et + vs Sulf Scan

The clearest difference is update cadence: Sulf Scan at every 3 weeks against Tri et +'s every 4 months. 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.

Tri et + ships an update every 4 months, Sulf Scan every 3 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Tri et + | Sulf Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 12 MB | 45 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ville d'Angers](https://appshunter.io/developer/1220370268) | [UNOVA](https://appshunter.io/developer/1210445553) |

## What reviewers say

### Tri et +

[App page](https://appshunter.io/ios/app/tri-et-plus/id1105475065)

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

**In-app purchases:** none


### Sulf Scan

[App page](https://appshunter.io/ios/app/sulf-scan/id6467767120)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tri et + free?

Tri et + is free to download, with no in-app purchases.

### Is Sulf Scan free?

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

### Do Tri et + or Sulf Scan have ads?

Neither Tri et + nor Sulf Scan shows ads.

### Which is updated more often, Tri et + or Sulf Scan?

Tri et + ships an update every 4 months, and Sulf Scan every 3 weeks. Most recently, Tri et + was updated on October 3, 2026 and Sulf Scan on October 5, 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.*