# Cidaas vs bluTag

The clearest difference is iOS requirement: bluTag at 13.1 against Cidaas's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Cidaas ships an update every 6 weeks, bluTag every 2 months. The most recent releases landed on December 5, 2025 and July 7, 2026 respectively.

## The numbers

| Metric | Cidaas | bluTag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/blutag/id1468461470/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | — | Free |
| Size | 114 MB | 16 MB |
| Requires iOS | 16.6 | **13.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WidasConcepts GmbH](https://appshunter.io/developer/1272143891) | [Blulog Sp. Z o.o.](https://appshunter.io/developer/1451078620) |

## What reviewers say

### Cidaas

[App page](https://appshunter.io/ios/app/cidaas/id1199864806)

**In-app purchases:** none


### bluTag

[App page](https://appshunter.io/ios/app/blutag/id1468461470)

Access temperature measurements from Blulog TLDL NFC dataloggers using your smartphone's NFC capabilities. View and retrieve data directly from the devices.

**Highlights:** Read temperature data, NFC datalogger access, Smartphone integration, Data retrieval

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cidaas free?

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

### Is bluTag free?

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

### Do Cidaas or bluTag have ads?

Neither Cidaas nor bluTag shows ads.

### Which is updated more often, Cidaas or bluTag?

Cidaas ships an update every 6 weeks, and bluTag every 2 months. Most recently, Cidaas was updated on December 5, 2025 and bluTag on July 7, 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.*