# BTG IOT HD vs iCalibration

The clearest difference is update cadence: iCalibration at every 4 weeks against BTG IOT HD's every 19 months. iCalibration also leads on iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

BTG IOT HD ships an update every 19 months, iCalibration every 4 weeks. The most recent releases landed on October 30, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | BTG IOT HD | iCalibration |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 4 weeks** |
| Size | 204 MB | 54 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [bolide](https://appshunter.io/developer/373005177) | [ICARVISIONS(SHENZHEN) TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1500826371) |

## What reviewers say

### BTG IOT HD

[App page](https://appshunter.io/ios/app/btg-iot-hd/id6443791172)

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

**In-app purchases:** none


### iCalibration

[App page](https://appshunter.io/ios/app/icalibration/id6450919217)

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

**In-app purchases:** none


## Frequently asked questions

### Is BTG IOT HD free?

BTG IOT HD is free to download, with no in-app purchases.

### Is iCalibration free?

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

### Do BTG IOT HD or iCalibration have ads?

Neither BTG IOT HD nor iCalibration shows ads.

### Which is updated more often, BTG IOT HD or iCalibration?

BTG IOT HD ships an update every 19 months, and iCalibration every 4 weeks. Most recently, BTG IOT HD was updated on October 30, 2026 and iCalibration on September 20, 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.*