HydroData vs GaugeWatcher
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.
GaugeWatcher
Access real-time river flow data without needing an account or encountering advertisements. Discover nearby gauges, monitor flow rates, and save your preferred locations for quick access.
- Real-time river flow data
- Discover nearby gauges
- Check flow rates
- Bookmark favorite gauges
- No signup required
- Ad-free experience
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Simple river flow data. No signup required. No ads. No fluff. Find nearby gauges, check flow rates, bookmark favorites. That's it.
Screenshots
Verdict
The clearest difference is rating: GaugeWatcher at 5.0 against HydroData's 2.6. GaugeWatcher also leads on update cadence (weekly vs monthly). On price, ratings volume, 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.
GaugeWatcher holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 5 and 3 respectively.
HydroData ships an update monthly, GaugeWatcher weekly. The most recent releases landed on August 5, 2026 and September 1, 2026 respectively.
| Parameter | HydroData | GaugeWatcher |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (5 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 5 — better | 3 |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 50 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Longitude 103 | Andrew Althage |
Customer experience
HydroData
GaugeWatcher
In-app purchases
HydroData
No in-app purchases
GaugeWatcher
No in-app purchases
Questions
Is HydroData free?
Is GaugeWatcher free?
Which has better reviews, HydroData or GaugeWatcher?
Do HydroData or GaugeWatcher have ads?
Which is updated more often, HydroData or GaugeWatcher?
Other comparisons
