# D vs Blu Card

The clearest difference is in-app purchases: Blu Card at none against D's 3. Blu Card also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. D sells 3 one-off in-app purchases. Blu Card asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | D | Blu Card |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Size | 109 MB | 59 MB |
| Requires iOS | 15.5 | **14.0.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [DAIR LAB SRL](https://appshunter.io/developer/1523514864) | [FIXR SAS DI ARDUINO ANDREA E C.](https://appshunter.io/developer/850403332) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-alert/id6478954548)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Min Package | $2.99 | one-time |
| 300 Min Package | $4.99 | one-time |
| 500 Min Package | $6.99 | one-time |


### Blu Card

[App page](https://appshunter.io/ios/app/blu-card/id6738088866)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D free?

D is free to download, with in-app purchases available.

### Is Blu Card free?

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

### Do D or Blu Card have ads?

D shows ads; Blu Card does not.

### Which is updated more often, D or Blu Card?

D ships an update every 3 months, and Blu Card every 3 months. Most recently, D was updated on October 3, 2026 and Blu Card on October 11, 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.*