Heat Index Pro vs Marées
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Heat Index Pro
This tool calculates the "felt air temperature" by combining air temperature and relative humidity using a specific scientific equation. It provides current weather conditions and allows users to search for and save favorite locations worldwide.
- Heat Index calculation (Rothfusz equation)
- Current temperature and humidity
- Choice of Celsius, Fahrenheit, and Kelvin
- Map current location
- Search and save unlimited favorite cities
- Intuitive graphics and ease of use
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The first "Heat Index" tool that uses the Lans P. Rothfusz equation. [Description] The heat index (HI) is an index that combines air temperature and relative humidity, in shaded areas, that is the feeling of "hot" or "cold" that is felt; it is due not only to the air temperature, but also to other environmental conditions, such as humidity and wind. The heat index was developed in 1979 by Robert G. Steadman. The computation of the heat index is a refinement of a result obtained by multiple regression analysis carried out by Lans P. Rothfusz and described in a 1990 National Weather Service (NWS) Technical Attachment (SR 90-23). The heat index is also known as the "felt air temperature", "apparent temperature", "real feel" or "feels like". The humidity in the air can increase the sensation of heat, while the wind can increase the sensation of cold. For example, when the temperature is 32°C (90°F) with 70% relative humidity, the heat index is 41°C (106°F). [How does it work] Wherever you are, you will have the Heat Index, temperature, humidity and weather conditions. Search for new locations and they will automatically be added to your favorites. Make sure you have activated the location services on your device, at this point the App will detect your geographical position. [Features] - Heat Index calculated with the Rothfusz equation - Temperature - Humidity - Effects of the Heat Index - Choice of 3 units of measurement: celsius, fahrenheit and kelvin - Map current location - Search City (without limits) - Save favorite places (without limits) - Intuitive graphics - Ease of use [Supported languages] English, Italian, Spanish, French, German, Portuguese, Dutch, Russian, Chinese, Japanese, Danish, Finnish, Norwegian, Swedish. [Support] If you need help please do not hesitate to contact us at info@lionsapp.com, or visit www.lionsapp.com If you like the App, don't forget to leave us a comment on the App Store.
Marées
Provides tide schedules, heights, and coefficients for over 150 French ports and some British ports. It operates autonomously, requiring internet only for updates and maps, and does not use geolocation data outside the app.
- Tide schedules for 150+ French ports
- Tide data for British ports
- Harmonic constants from Previ Mer
- Autonomous operation
- Customizable tide height thresholds
- Local time display (summer/winter)
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Schedule, heights and coefficients of the tides on more than 150 French ports and some ports in Great Britain. Application made from the harmonic constants provided by Previ Mer. It is completely autonomous: the internet connection is only used for updates and for displaying maps. No advertising. No use of geolocation data outside the application and only to locate the nearest port. All local times displayed are summer and winter times. The menu allows you to calculate the tides and give the specifics for a day Set your own threshold (minimum height for practicing navigation or maximum for fishing on foot). Ask for other ports if necessary. Thank you for sharing your comments in order to further improve the application.
Screenshots
Verdict
The clearest difference is rating: Heat Index Pro at 3.9 against Marées's 1.0. Heat Index Pro also leads on review sentiment (25% vs 6%) and ratings volume (9 vs 1). Marées's advantage is price ($1.99 vs $2.99) and iOS requirement (12.0 vs 26.0). On update cadence, ads, in-app purchases and monetization model 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
Heat Index Pro costs $2.99 and Marées $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Heat Index Pro holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: Heat Index Pro has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 25% of Heat Index Pro's written reviews are positive against 6% of Marées's.
Heat Index Pro ships an update every 5 weeks, Marées every 3 weeks. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | Heat Index Pro | Marées |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | 3.9 (9 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 25.0% of reviews — better | 6.3% of reviews |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 54 MB |
| Age rating | 4+ | 17+ |
| Developer | LionsApp di Nallbati Elton | Christian Guine |
Customer experience
Heat Index Pro
Marées
In-app purchases
Heat Index Pro
No in-app purchases
Marées
No in-app purchases
Questions
Is Heat Index Pro free?
Is Marées free?
Which has better reviews, Heat Index Pro or Marées?
Do Heat Index Pro or Marées have ads?
Which is updated more often, Heat Index Pro or Marées?
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