# HS-221 — Mesure humidity in the walls

> Measures and registers rising damp in walls using electrical resistivity. (iPhone/iPad app by HUMITAT-STOP S.L..)

- Source: https://appshunter.io/ios/app/hs-221/id1622669307 (this page in markdown: same URL + `.md`)
- Developer: [HUMITAT-STOP S.L.](https://appshunter.io/developer/1622669309)
- Category: Utilities, Lifestyle
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 5 MB
- Languages: American English, Catalan, French (France), European Spanish
- Released: 2022-05-23
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/hs-221/id1622669307/reviews.md

## What is HS?

Measurement and register system for the rising damp in walls, measuring the resistivity between two screws fixed to a wall. The readings are sent through Bluetooth and stored to your iPhone using this app.

## Key features

- Measures wall humidity
- Calculates electrical resistivity
- Bluetooth data transmission
- Stores readings on iPhone
- Rising damp registration system

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hs-221/id1622669307/reviews.md

### 1/5 — Useless

*2022-11-01*

App will not load just keep looking for the device

## Frequently asked questions about HS

### How does HS-221 measure humidity?

HS-221 measures humidity by calculating the electrical resistivity between two screws fixed to a wall. This method helps identify rising damp in the structure.

### Does HS-221 require a special device?

Yes, HS-221 requires two screws to be fixed to the wall for measurement. The readings are then sent via Bluetooth to your iPhone.

### What devices does HS-221 support?

HS-221 is currently supported on iPhone devices.

### How often is HS-221 updated?

The latest version of HS-221 is 1.3, last updated on March 12, 2026. Update frequency information is not available.

### What is the age rating for HS-221?

HS-221 has an age rating of 4+, making it suitable for a wide range of users.

### Can I export the humidity readings from HS-221?

The description does not specify if readings can be exported. The app stores readings to your iPhone for registration and analysis.

### Does HS-221 have ads?

No, HS-221 does not contain advertisements. It is a free application without any ads.

### What is the user sentiment for HS-221?

HS-221 has a perfect rating of 5.0 stars from 1 rating, indicating positive user sentiment based on available data.

## Version history (last 5 releases)

### 1.3 — 2026-03-12

This version is compatible with the new HUMISCAN device. It also includes some internal improvements and is optimized for iOS 26.

### 1.2 — 2022-10-12

The app is now also available in Spanish.

### 1.1.2 — 2022-07-06

Minor changes in some texts

### 1.1.1 — 2022-06-15

Launch screen has been fixed

### 1.1 — 2022-06-14

- New app icon
- Minor UI improvements

## Apps similar to HS

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [VJHumidity](https://appshunter.io/ios/app/vjhumidity/id1671924199) | — | Free | Utilities |
| [bluSensor](https://appshunter.io/ios/app/blusensor/id1018752395) | 1.0 (5) | Free | Utilities |
| [RT Q Tester](https://appshunter.io/ios/app/rt-q-tester/id1381282380) | — | Free | Utilities |
| [MoistAPP](https://appshunter.io/ios/app/moistapp/id6443408446) | — | Free | Utilities |
| [H2O Precision Moisture Sensor](https://appshunter.io/ios/app/h2o-precision-moisture-sensor/id1380753307) | 4.3 (3) | Free | Utilities |
| [Mould identifier](https://appshunter.io/ios/app/mould-identifier/id6751037115) | — | Free | Utilities |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*