# K for Contact vs EspBlufi

The clearest difference is iOS requirement: EspBlufi at 10.0 against K for Contact's 15.1. 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.

K for Contact ships an update every 5 months, EspBlufi every 2 months. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | K for Contact | EspBlufi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.3 (3 ratings)](https://appshunter.io/ios/app/espblufi/id1450614082/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 11 MB | 3 MB |
| Requires iOS | 15.1 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [New Seed IT Solutions AB](https://appshunter.io/developer/1214628239) | [ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.](https://appshunter.io/developer/1071176699) |

## What reviewers say

### K for Contact

[App page](https://appshunter.io/ios/app/k-for-contact/id1363526654)

**Features:** macOS Compatibility

**In-app purchases:** none


### EspBlufi

[App page](https://appshunter.io/ios/app/espblufi/id1450614082)

This utility app facilitates communication with IoT devices using BLE data. It enables device distribution and custom data transmission, requiring the external device to be powered on for connection.

**Highlights:** BLE communication with IoT devices, Device distribution, Custom data transmission, Custom data reception, Search and connect functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is K for Contact free?

K for Contact is free to download, with no in-app purchases.

### Is EspBlufi free?

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

### Do K for Contact or EspBlufi have ads?

Neither K for Contact nor EspBlufi shows ads.

### Which is updated more often, K for Contact or EspBlufi?

K for Contact ships an update every 5 months, and EspBlufi every 2 months. Most recently, K for Contact was updated on October 26, 2026 and EspBlufi on October 21, 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.*