# REMS App vs Celsis

The clearest difference is update cadence: Celsis at weekly against REMS App's every 2 months. REMS App's advantage is iOS requirement (9.0 vs 17.0). 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.

REMS App ships an update every 2 months, Celsis weekly. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | REMS App | Celsis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 555 MB | 30 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [REMS GmbH & Co KG](https://appshunter.io/developer/799265024) | [Celsis UAB](https://appshunter.io/developer/6808233734) |

## What reviewers say

### REMS App

[App page](https://appshunter.io/ios/app/rems-app/id961100058)

**Features:** macOS Compatibility

**In-app purchases:** none


### Celsis

[App page](https://appshunter.io/ios/app/celsis/id6808233732)

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

**In-app purchases:** none


## Frequently asked questions

### Is REMS App free?

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

### Is Celsis free?

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

### Do REMS App or Celsis have ads?

Neither REMS App nor Celsis shows ads.

### Which is updated more often, REMS App or Celsis?

REMS App ships an update every 2 months, and Celsis weekly. Most recently, REMS App was updated on October 7, 2026 and Celsis 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.*