# Mailinblack vs Celec IoT

The clearest difference is iOS requirement: Celec IoT at 15.0 against Mailinblack's 18.0. 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.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Mailinblack | Celec IoT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 99 MB | 137 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Mailinblack](https://appshunter.io/developer/1465120919) | [Celec](https://appshunter.io/developer/1634197210) |

## What reviewers say

### Mailinblack

[App page](https://appshunter.io/ios/app/mailinblack/id6464315792)

**In-app purchases:** none


### Celec IoT

[App page](https://appshunter.io/ios/app/celec-iot/id6593685434)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mailinblack free?

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

### Is Celec IoT free?

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

### Do Mailinblack or Celec IoT have ads?

Neither Mailinblack nor Celec IoT shows ads.

### Which is updated more often, Mailinblack or Celec IoT?

Mailinblack ships an update every 3 weeks, and Celec IoT every 3 weeks. Most recently, Mailinblack was updated on November 3, 2026 and Celec IoT on November 8, 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.*