# OhmKit vs Altimeter + Barometermeter

The clearest difference is ads: Altimeter + Barometermeter at none against OhmKit's shown. Altimeter + Barometermeter also leads on update cadence (every 2 days vs every 6 weeks). OhmKit's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. OhmKit sells 1 one-off in-app purchase and Altimeter + Barometermeter sells 1 in-app purchase, starting at $49.99 per year. Whichever you choose, the download price is not the number that matters.

OhmKit ships an update every 6 weeks, Altimeter + Barometermeter every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OhmKit | Altimeter + Barometermeter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Size | 30 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YAVUZHAN CANAKCI](https://appshunter.io/developer/6771883217) | [佳俊 高](https://appshunter.io/developer/1807816708) |

## What reviewers say

### OhmKit

[App page](https://appshunter.io/ios/app/ohmkit-resistor-calculator/id6773154145)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Altimeter + Barometermeter

[App page](https://appshunter.io/ios/app/altimeter-plus-barometermeter/id6803945383)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Membership | $49.99 | per year |


## Frequently asked questions

### Is OhmKit free?

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

### Is Altimeter + Barometermeter free?

Altimeter + Barometermeter is free to download, with in-app purchases available.

### Do OhmKit or Altimeter + Barometermeter have ads?

OhmKit shows ads; Altimeter + Barometermeter does not.

### Which is updated more often, OhmKit or Altimeter + Barometermeter?

OhmKit ships an update every 6 weeks, and Altimeter + Barometermeter every 2 days. Most recently, OhmKit was updated on November 5, 2026 and Altimeter + Barometermeter on October 31, 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.*