# Blue Map vs Ocean Water Temperature

The clearest difference is price: Blue Map at Free against Ocean Water Temperature's $1.99. Blue Map also leads on rating (5.0 vs 3.6) and update cadence (every 2 weeks vs every 4 months). Ocean Water Temperature's advantage is ratings volume (171 vs 2) and chart position (#94 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Blue Map is free to download; Ocean Water Temperature costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Blue Map holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Ocean Water Temperature has 171 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 64% of Blue Map's written reviews are positive against 41% of Ocean Water Temperature's.

Blue Map ships an update every 2 weeks, Ocean Water Temperature every 4 months. Both last shipped on October 22, 2026.

## The numbers

| Metric | Blue Map | Ocean Water Temperature |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/blue-map/id838211758/reviews)** | [3.6 (171 ratings)](https://appshunter.io/ios/app/ocean-water-temperature/id1264913159/reviews) |
| Number of ratings | 2 | **171** |
| Positive reviews | **64.5% of reviews** | 40.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#94** |
| Size | 127 MB | 8 MB |
| Requires iOS | 15 | **13.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [北京市朝阳区公众环境研究中心](https://appshunter.io/developer/838211761) | [LW Brands, LLC](https://appshunter.io/developer/963599018) |

## What reviewers say

### Blue Map

[App page](https://appshunter.io/ios/app/blue-map/id838211758)

Access global environmental data, including air and water quality, corporate emissions, and ecological information. Participate in environmental protection by reporting pollution, sharing data, and tracking your low-carbon actions. Visualize environmental conditions with interactive maps and receive AI-driven insights and health alerts.

**Highlights:** Real-time environmental quality data, Corporate emissions and performance tracking, Public pollution reporting and action, Interactive environmental maps, AI-powered data insights, Personalized health and environmental alerts

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Ocean Water Temperature

[App page](https://appshunter.io/ios/app/ocean-water-temperature/id1264913159)

**Currently charting:** #94 Top Paid · Weather (US App Store)

Access real-time ocean water temperatures, tide information, and detailed wave forecasts. View SST charts, historical wave data, and marine weather forecasts from NOAA and NWS. Save your favorite locations for quick access.

**Highlights:** Current ocean water temperature and tides, Sea Surface Temperature (SST) charts, Historical wave height reports, 7-day NOAA wave forecast, 7-day harmonic tide forecast, 5-day NWS marine weather forecast, NOAA Weather Layer Charts

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 👍 Simple and functional
- 👍 Good for planning activities
- 👍 Accurate surface temperature
- 👍 Customer service responsiveness

**What reviewers complain about**

- 😞 No specific location temperature
- 😞 Limited data coverage
- 😞 App unresponsive/crashes
- 😞 Difficult to read temperature scale
- 😞 Not helpful for specific needs

**Reported bugs**

- App says not responding
- Cannot place cursor for specific temperature
- Cannot change map temperature scale range
- Cannot change units
- FAQ section unhelpful

**Requested features**

- Ability to place cursor for specific temperature
- Changeable map temperature scale range
- Changeable units
- Larger temperature scale size
- More detailed ocean floor map


## Frequently asked questions

### Is Blue Map free?

Blue Map is free to download, with no in-app purchases.

### Is Ocean Water Temperature free?

Ocean Water Temperature costs $1.99, with no in-app purchases.

### Which has better reviews, Blue Map or Ocean Water Temperature?

Blue Map is rated higher. Blue Map averages 5.0 out of 5 from 2 ratings, while Ocean Water Temperature averages 3.6 from 171 ratings.

### Do Blue Map or Ocean Water Temperature have ads?

Neither Blue Map nor Ocean Water Temperature shows ads.

### Which is updated more often, Blue Map or Ocean Water Temperature?

Blue Map ships an update every 2 weeks, and Ocean Water Temperature every 4 months. Most recently, Blue Map was updated on October 22, 2026 and Ocean Water Temperature on October 22, 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.*