Comparison

Morse Relay vs Hydro

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

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.

Highlights
  • Send Morse code via torch
  • Receive Morse code via camera
  • Screen blinking for Morse code
  • App-to-app encoding/decoding
  • Morse code transmission
Features
Read full description

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

About

Hydro

Features
Read full description

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

Morse Relay3 screens
Hydro2 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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.

UpkeepUpdate frequency

Morse Relay ships an update every 4 months, Hydro monthly. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard3 real differences Β· 5 level
Morse Relay versus Hydro: the parameters behind the verdict, then further details
ParameterMorse RelayHydro
Price$0.99Free β€” better
Positive reviews33.3% of reviewsβ€”
Update frequencyEvery 4 monthsMonthly β€” better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidβ€”
DevicesiPhone, iPadiPhone, iPad, Apple Watch β€” better
Requires iOS18.0 β€” better26.0
Further details β€” not scored
Size2 MB9 MB
Age rating4+4+
DeveloperEcho Labs AGPatrick

In-app purchases

None

Morse Relay

No in-app purchases

None

Hydro

No in-app purchases

Questions

Is Morse Relay free?
Morse Relay costs $0.99, with no in-app purchases.
Is Hydro free?
Hydro is free to download, with no in-app purchases.
Do Morse Relay or Hydro have ads?
Neither Morse Relay nor Hydro shows ads.
Which is updated more often, Morse Relay or Hydro?
Morse Relay ships an update every 4 months, and Hydro monthly. Most recently, Morse Relay was updated on November 2, 2026 and Hydro on October 30, 2026.

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