# Track&Trace OS vs Kelsius

Track&Trace OS and Kelsius are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Track&Trace OS | Kelsius |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 19 MB | 24 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [osapiens Network GmbH](https://appshunter.io/developer/1533428250) | [Frederic Lusson](https://appshunter.io/developer/1700826405) |

## What reviewers say

### Track&Trace OS

[App page](https://appshunter.io/ios/app/track-and-trace-os/id6447892119)

**In-app purchases:** none


### Kelsius

[App page](https://appshunter.io/ios/app/kelsius/id6457253123)

**In-app purchases:** none


## Frequently asked questions

### Is Track&Trace OS free?

Track&Trace OS is free to download, with no in-app purchases.

### Is Kelsius free?

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

### Do Track&Trace OS or Kelsius have ads?

Neither Track&Trace OS nor Kelsius shows ads.

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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.*