# i vs HB

The clearest difference is iOS requirement: HB at 15.0 against i's 17.6. 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.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | i | HB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 34 MB | 80 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IFE Aufbereitungstechnik GmbH](https://appshunter.io/developer/1616801396) | [HB-Therm](https://appshunter.io/developer/1669572191) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-step-vibrosense/id1670367375)

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

**In-app purchases:** none


### HB

[App page](https://appshunter.io/ios/app/hb-therm-e-cockpit/id6469505234)

**In-app purchases:** none


## Frequently asked questions

### Is i free?

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

### Is HB free?

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

### Do i or HB have ads?

Neither i nor HB shows ads.

### Which is updated more often, i or HB?

i ships an update every 2 months, and HB every 2 months. Most recently, i was updated on October 30, 2026 and HB on October 30, 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.*