Hydro vs StarLoc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hydro
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Hydro - The ultimate app for accurate water information! With this innovative app, you always have an overview of all important data on water levels, water temperatures, precipitation and groundwater levels in the Austrian province of Upper Austria. - Current water levels: Follow the current water levels of the rivers, lakes and bodies of water in Upper Austria in real time. - Water temperatures: Find out the current water temperatures of the various bodies of water. - Rainfall: Stay informed about the amount of precipitation in Upper Austria. - Groundwater level: Get important information about the groundwater level. - Open data interface: All data is obtained via an open data interface - Datasource: Land Oberösterreich - data.ooe.gv.at
StarLoc
This app provides precise GPS coordinates, altitude, and time data in a night-friendly interface for astronomers. It offers essential information for telescope alignment and observation, with a focus on preserving night vision.
- Night-friendly dark theme
- Accurate latitude and longitude (DMS)
- Decimal coordinate support
- Real-time GPS updates
- Local, UTC, and offset time
- Elevation in meters and feet
- Horizontal and vertical accuracy
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StarLoc is a clean, distraction-free GPS tool designed specifically for stargazing. Get accurate latitude, longitude, altitude, and time in formats ready for telescope alignment all in a night-friendly interface. Built for the Night Sky • Unlike standard GPS apps, StarLoc uses a dark theme with red and green text to help preserve your night vision during astronomy sessions. Accurate Location Data • Latitude & Longitude (DMS format) • Decimal coordinates for quick entry • Real-time GPS updates • High-accuracy positioning data Time & Alignment Ready • Local time (12-hour & 24-hour) • UTC time and offset • Date display for precise telescope setup Altitude & Accuracy • Elevation in meters and feet • Horizontal and vertical accuracy readings Simple, focused and reliable. StarLoc provides the essential data you need to align your telescope and start observing. Perfect for backyard astronomers and dark-sky explorers alike.
Screenshots
Verdict
The clearest difference is update cadence: Hydro at monthly against StarLoc's every 2 months. StarLoc's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support 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.
Hydro ships an update monthly, StarLoc every 2 months. The most recent releases landed on October 8, 2026 and October 16, 2026 respectively.
| Parameter | Hydro | StarLoc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Patrick | Daniel Schaich |
In-app purchases
Hydro
No in-app purchases
StarLoc
No in-app purchases








