# WATTSTUNDE vs sonsor

The clearest difference is review sentiment: sonsor at 88% against WATTSTUNDE's 0%. sonsor also leads on update cadence (every 3 weeks vs every 10 months). WATTSTUNDE's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

WATTSTUNDE ships an update every 10 months, sonsor every 3 weeks. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | WATTSTUNDE | sonsor |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 45 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [WATTSTUNDE GmbH](https://appshunter.io/developer/1469009647) | [pironex GmbH](https://appshunter.io/developer/1003725747) |

## What reviewers say

### WATTSTUNDE

[App page](https://appshunter.io/ios/app/wattstunde/id1469009648)

Monitor your WATTSTUNDE Lithium Ion batteries wirelessly from your phone. Track cycle life, state of charge, voltage, current, and temperature for each battery independently. View battery events and signal levels with easy-to-read gauges.

**Highlights:** Wireless battery connection, Independent BMS access, Track cycle life, State of Charge (SOC) percentage, Display voltage, current, and temperature, Battery events display

**Features:** macOS Compatibility

**In-app purchases:** none


### sonsor

[App page](https://appshunter.io/ios/app/sonsor-alarm-system/id6474242682)

Receive real-time alerts for break-ins and environmental data directly on your phone. This system detects various security threats and monitors conditions like fire, mold risk, sound, air quality, and temperature. Track sensor data live and customize your alerts and device management.

**Highlights:** Break-in detection, Environmental data monitoring, Real-time sensor tracking, Customizable alerts, Multi-device and member support, LTE and GPS integration

**In-app purchases:** none


## Frequently asked questions

### Is WATTSTUNDE free?

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

### Is sonsor free?

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

### Do WATTSTUNDE or sonsor have ads?

Neither WATTSTUNDE nor sonsor shows ads.

### Which is updated more often, WATTSTUNDE or sonsor?

WATTSTUNDE ships an update every 10 months, and sonsor every 3 weeks. Most recently, WATTSTUNDE was updated on October 18, 2026 and sonsor on October 24, 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.*