# Water Temperatures vs Proyecto Mastral

The clearest difference is in-app purchases: Proyecto Mastral at none against Water Temperatures's 3. Proyecto Mastral also leads on ads (none vs shown) and update cadence (every 11 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Water Temperatures sells 3 in-app purchases, starting at $2.99 per month. Proyecto Mastral asks for nothing beyond the download.

Water Temperatures ships an update every 2 months, Proyecto Mastral every 11 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Water Temperatures | Proyecto Mastral |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (15 ratings)](https://appshunter.io/ios/app/water-temperatures/id1227386048/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 21.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 30 MB |
| Requires iOS | 16 | **15.6** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blaz Smolnikar](https://appshunter.io/developer/1150013940) | [ICON Tech](https://appshunter.io/developer/1742812567) |

## What reviewers say

### Water Temperatures

[App page](https://appshunter.io/ios/app/water-temperatures/id1227386048)

Get real-time sea and lake temperatures worldwide with historical data and custom alerts for various water activities. Compare locations, view seasonal trends, and explore with enhanced map features.

**Highlights:** Global water temperature data, Temperature history and trends, Custom activity alerts, Seasonal insights, Location comparison, Interactive map annotations

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $14.99 | per year |
| Remove ads & ∞ notifications | $40.99 | one-time |


### Proyecto Mastral

[App page](https://appshunter.io/ios/app/proyecto-mastral/id6453560246)

**In-app purchases:** none


## Frequently asked questions

### Is Water Temperatures free?

Water Temperatures is free to download, with in-app purchases available.

### Is Proyecto Mastral free?

Proyecto Mastral is free to download, with no in-app purchases.

### Do Water Temperatures or Proyecto Mastral have ads?

Water Temperatures shows ads; Proyecto Mastral does not.

### Which is updated more often, Water Temperatures or Proyecto Mastral?

Water Temperatures ships an update every 2 months, and Proyecto Mastral every 11 days. Most recently, Water Temperatures was updated on November 2, 2026 and Proyecto Mastral on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*