# ISRTRI vs Ssweat

The clearest difference is update cadence: ISRTRI at weekly against Ssweat's every 13 months. Ssweat's advantage is iOS requirement (15.1 vs 18.6). 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.

ISRTRI ships an update weekly, Ssweat every 13 months. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | ISRTRI | Ssweat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 13 months |
| Size | 17 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ran kellner](https://appshunter.io/developer/1372973121) | [Arbox LTD](https://appshunter.io/developer/1021244486) |

## What reviewers say

### ISRTRI

[App page](https://appshunter.io/ios/app/isrtri/id1546991465)

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

**In-app purchases:** none


### Ssweat

[App page](https://appshunter.io/ios/app/ssweat/id6511228525)

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

**In-app purchases:** none


## Frequently asked questions

### Is ISRTRI free?

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

### Is Ssweat free?

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

### Do ISRTRI or Ssweat have ads?

Neither ISRTRI nor Ssweat shows ads.

### Which is updated more often, ISRTRI or Ssweat?

ISRTRI ships an update weekly, and Ssweat every 13 months. Most recently, ISRTRI was updated on October 2, 2026 and Ssweat on October 1, 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.*