HydroData vs whatwatt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HydroData
This app enables field data collection with map integration to pinpoint features and track your location. It supports gathering field reports, well water levels, and dam inspection data, syncing it all to the cloud when convenient.
- Field data collection
- Map-based feature selection
- Location tracking
- Cloud synchronization
- Well water level logging
- Dam inspection reports
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The application allows you to collect information within the field and then sync back to the cloud whenever you are ready. This includes a full map to select the feature while seeing your location on the map as well. It will also allow you to collect field reports, well water levels, and dam inspections.
whatwatt
This utility app is preparing for future enhancements. Developers are working on new functionalities that will be revealed soon.
- Future feature groundwork
- Upcoming enhancements
- Developer updates
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The app that allows you to install whatwatt Go on a compatible smart meter, receive smart meter data in real time and connect your smart meter to services. Made for Switzerland.
Screenshots
Verdict
The clearest difference is rating: whatwatt at 5.0 against HydroData's 2.6. HydroData's advantage is ratings volume (5 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
whatwatt holds the better App Store score, 5.0 against 2.6. That said, the two scores are not equally well evidenced: HydroData has 5 ratings behind it against 1, so its average is the more settled of the two.
HydroData ships an update monthly, whatwatt every 2 weeks. The most recent releases landed on August 5, 2026 and September 16, 2026 respectively.
| Parameter | HydroData | whatwatt |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 5 — better | 1 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 50 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Longitude 103 | whatwatt AG |
Customer experience
HydroData
whatwatt
In-app purchases
HydroData
No in-app purchases
whatwatt
No in-app purchases
