# Thermometer vs Viessmann Access

The clearest difference is in-app purchases: Viessmann Access at none against Thermometer's 1. Viessmann Access also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Thermometer sells 1 one-off in-app purchase. Viessmann Access asks for nothing beyond the download.

Thermometer ships an update every 2 months, Viessmann Access every 4 months. The most recent releases landed on September 29, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Thermometer | Viessmann Access |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (4.2K ratings)](https://appshunter.io/ios/app/thermometer/id357949214/reviews)** | — |
| Number of ratings | **4.2K** | — |
| Positive reviews | 30.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 52 MB |
| Requires iOS | 13.0 | **12** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Morcos](https://appshunter.io/developer/1453181584) | [Viessmann IT Service GmbH](https://appshunter.io/developer/1801739683) |

## What reviewers say

### Thermometer

[App page](https://appshunter.io/ios/app/thermometer/id357949214)

This app transforms your iPhone or iPod Touch into a thermometer, displaying the exact outside temperature based on your current location. It provides detailed local weather conditions and allows you to check temperatures for other cities.

**Highlights:** Real-time outdoor temperature display, Location-based temperature readings, Local weather condition reports, Temperature checks for other cities, Celsius and Fahrenheit support, Universal app for all devices

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Temperature Forecast | $1.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Quick temperature display
- 💡 Useful for checking outdoor temperature

**What reviewers complain about**

- 🐛 Inaccurate temperature readings
- 🔍 Doesn't measure room/indoor temperature
- 💤 Doesn't update temperature in real-time
- 🔋 High battery consumption
- 📢 Excessive ads even in paid version

**Reported bugs**

- App crashes frequently
- Doesn't detect location properly
- Reported temperatures are inconsistent

**Requested features**

- Option to display indoor temperature
- Real-time temperature updates
- Ability to set temperature alerts/alarms


### Viessmann Access

[App page](https://appshunter.io/ios/app/viessmann-access/id1533222623)

**In-app purchases:** none


## Frequently asked questions

### Is Thermometer free?

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

### Is Viessmann Access free?

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

### Do Thermometer or Viessmann Access have ads?

Thermometer shows ads; Viessmann Access does not.

### Which is updated more often, Thermometer or Viessmann Access?

Thermometer ships an update every 2 months, and Viessmann Access every 4 months. Most recently, Thermometer was updated on September 29, 2026 and Viessmann Access on September 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.*