Morse Relay vs Hydro
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Morse Relay
This app enables users to send and receive Morse code using their device's torch or screen. It supports app-to-app communication for encoding and decoding messages, with a visual blinking box option for devices without a torch.
- Send Morse code via torch
- Receive Morse code via camera
- Screen blinking for Morse code
- App-to-app encoding/decoding
- Morse code transmission
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Morse Relay allows you to: - Send out morse code over your device's torch - Record it by pointing your camera at another device that is emitting a morse message. Currently, it only supports encoding and decoding from app to app. The algorithms do not support human message fully yet. For device without torch, the signal is emitted in a blinking box on the screen. For suggestions or collaborations, contact @nidegen
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 OberΓΆsterreich - data.ooe.gv.at
Screenshots
Verdict
The clearest difference is price: Hydro at Free against Morse Relay's $0.99. Hydro also leads on update cadence (monthly vs every 4 months). Morse Relay's advantage is iOS requirement (18.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Hydro is free to download; Morse Relay costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Morse Relay ships an update every 4 months, Hydro monthly. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.
| Parameter | Morse Relay | Hydro |
|---|---|---|
| Price | $0.99 | Free β better |
| Positive reviews | 33.3% of reviews | β |
| Update frequency | Every 4 months | Monthly β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | β |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch β better |
| Requires iOS | 18.0 β better | 26.0 |
| Further details β not scored | ||
| Size | 2 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Echo Labs AG | Patrick |
In-app purchases
Morse Relay
No in-app purchases
Hydro
No in-app purchases









