# KeyIoT vs Barometer ∞ Pressure Altitude

The clearest difference is ads: KeyIoT at none against Barometer ∞ Pressure Altitude's shown. KeyIoT also leads on update cadence (monthly vs every 10 months) and device support (3 vs 1). On price 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.

KeyIoT ships an update monthly, Barometer ∞ Pressure Altitude every 10 months. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KeyIoT | Barometer ∞ Pressure Altitude |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/barometer-pressure-altitude/id6740811403/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 10 months |
| Monetization | — | Ad-supported |
| Size | 4 MB | 16 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alger sas](https://appshunter.io/developer/1129794327) | [Fawkes Wei](https://appshunter.io/developer/432767536) |

## What reviewers say

### KeyIoT

[App page](https://appshunter.io/ios/app/keyiot/id1185476814)

**Features:** macOS Compatibility

**In-app purchases:** none


### Barometer ∞ Pressure Altitude

[App page](https://appshunter.io/ios/app/barometer-pressure-altitude/id6740811403)

Access your device's built-in barometer for real-time atmospheric pressure and altitude readings. Offers multiple units and works offline without requiring signup or subscriptions.

**Highlights:** Live barometric pressure readings, Current altitude display, Multiple pressure units (atm, hPa, kPa, Bar), Offline functionality, Native iOS design, Minimalist interface

**In-app purchases:** none


## Frequently asked questions

### Is KeyIoT free?

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

### Is Barometer ∞ Pressure Altitude free?

Barometer ∞ Pressure Altitude is free to download, with no in-app purchases.

### Do KeyIoT or Barometer ∞ Pressure Altitude have ads?

Barometer ∞ Pressure Altitude shows ads; KeyIoT does not.

### Which is updated more often, KeyIoT or Barometer ∞ Pressure Altitude?

KeyIoT ships an update monthly, and Barometer ∞ Pressure Altitude every 10 months. Most recently, KeyIoT was updated on October 6, 2026 and Barometer ∞ Pressure Altitude on October 25, 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.*