Comparison

Blue Map vs Ocean Water Temperature

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

Head to head
About

Blue Map

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
Read full description

Blue Map: Your Mobile Portal for Environmental Transparency, Oversight, and Participation We aggregate corporate environmental data, emissions, air/water quality, and ecological info to build a platform where everyone can participate in protecting our planet. 【Data at Your Fingertips】 • Environmental Quality: Real-time air quality in 380 cities & water quality from 1,900+ stations. • Corporate Emissions: Track real-time discharges of 9,000+ air/water polluters. • Corporate Performance: Monitor 6.6M+ enterprises with 1.7M+ violation records. • Carbon Data: Access corporate and regional emissions data for low-carbon action. 【Public Participation】 • Micro-Reporting: Submit pollution leads and track progress, driving thousands of industrial firms to respond and reduce emissions. • One-Key Sharing: Instantly share data on social media, @ authorities to drive action. • Fingertip Environmentalism: Report issues, observe waste sorting, join eco-surveys, log low-carbon acts, and check product footprints with "Carbon-EZ-Check." 【Visual & Interactive Maps】 • 48-Hr Minute-Level Maps: Hourly forecasts for air quality, wind, rain, and typhoons. • Multi-Dimensional Maps: View air/water quality, emissions, corporate records, species distribution, and global solar data in layered visuals. 【AI & Health Features】 • AI Insights: Get plain-English explanations of complex environmental data. • Health Care: Receive alerts for masks, ventilation, air quality, pollen, and outdoor exercise, with personalized risk assessments. Blue Map makes the environment visible and turns your actions into a force for change. 【Honors】 The Blue Map App is developed by the Institute of Public & Environmental Affairs (IPE), a Beijing-based non-profit. Since 2006, IPE has built open environmental data platforms to drive corporate green transformation and improve governance. Awards include: • 2012: Goldman Environmental Prize; 3rd China Soft Science Award. • 2014: Selected for Beijing's first "Green Environmental Protection Theme App." • 2016: Public Participation & Innovation Award (IFCE). • 2017: Founding Member & Vice Chair, Green Consumption and Supply Chain Alliance. • 2018: Vice Chair, China Green Supply Chain Alliance. • 2020: Founding Member, Green Finance Committee (MIIT). • Mar 2023: National award for COVID-19 community guideline research. • Jul 2023: Outstanding Partner, "Whole Value Chain Model for Plastic Pollution Governance" (All-China Environment Federation). • Mar 2024: Council Member, All-China Environment Federation (5-year term). • Jul 2024: Partner, "Swift Action" Tech Initiative (Chaoyang District). 【Contact】 • Website: https://www.ipe.org.cn • Weibo: http://weibo.com/u/5042247906 • Tel: 010-67189470 ext. 8001 【Thanks】 To everyone tracking pollution, monitoring haze, and sharing forecasts—thank you!

About

Ocean Water Temperature

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
Currently charting
Read full description

Features Include: * Current ocean water temperature and tides! * SST (Sea Surface Temperature) charts * 6-hour historical wave height reports * 7-day, hourly NOAA wave forecast * 7-day, hourly harmonic tide forecast * 5-day National Weather Service marine weather forecast * NOAA Weather Layer Charts * Automatically saves your favorite buoy for quick viewing 6-hour History Data Includes: - Primary and secondary wave height, period, direction - Wave energy, period, direction 7-day NOAA WaveWatch III Forecast Model Includes: - Hourly swell component predictions (1-6 swells) - Accurate wave height, period, direction predictions 7-day Hourly Harmonic Tide Forecast Includes: - Interactive tide graphs - Hourly tide predictions - Current tide 5-day NWS Marine Forecast Includes: - Text summary forecast - Weather, sky, wind, waves Weather Layer Charts include: - Sea Surface Temperature (SST) - HD Weather Radar - Wind Speed & Direction - Air Temperature - 12-Hour Rain Probability - Significant Wave Height ** Available for iPad and iPhone with single purchase** IMPORTANT: Please remember that this app can only show data the buoy collects. Not all buoys collect wave data. This app will display all data collected by a buoy. If you have any questions before purchasing, please email me at mwnbdc@gmail.com. I typically respond by the end of the day. If you notice a missing a buoy, please contact me first rather than leaving a poor review. If you are correct, the buoy can be easily be added to the cloud database. Enjoy.

Screenshots

Blue Map4 screens
Ocean Water Temperature4 screens

Verdict

The call

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 review sentiment (71% vs 41%). Ocean Water Temperature's advantage is ratings volume (171 vs 2) and chart position (#63 vs unranked). On ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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: 71% of Blue Map's written reviews are positive against 41% of Ocean Water Temperature's.

UpkeepUpdate frequency

Blue Map ships an update every 2 weeks, Ocean Water Temperature every 4 months. The most recent releases landed on September 27, 2026 and September 28, 2026 respectively.

Scorecard8 real differences · 3 level
Blue Map versus Ocean Water Temperature: the parameters behind the verdict, then further details
ParameterBlue MapOcean Water Temperature
PriceFree — better$1.99
Rating5.0 (2 ratings) — better3.6 (171 ratings)
Positive reviews71.2% of reviews — better40.5% of reviews
Number of ratings2171 — better
Update frequencyEvery 2 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#63 — better
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS1513.0 — better
Further details — not scored
Size127 MB8 MB
Age rating4+12+
Developer北京市朝阳区公众环境研究中心LW Brands, LLC

Customer experience

Blue Map

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews52 reviews
Positive71.2%
Neutral7.7%
Negative21.2%

Ocean Water Temperature

All ratings171 ratings
Positive63.7%
Neutral5.8%
Negative30.4%
Written reviews37 reviews
Positive40.5%
Neutral5.4%
Negative54.1%

Bugs and requests

Blue Map

Not enough reviews yet to summarise bugs or requests.

Ocean Water Temperature

Reported bugs

18 issues
  • App says not responding
  • Cannot place cursor for specific temperature
  • Cannot change map temperature scale range
  • Cannot change units
  • FAQ section unhelpful
Show 13 more
  • App has gone downhill
  • Never shows actual temperature
  • App is useless for specific locations
  • Clicking on buoy does nothing
  • Map does not show specific buoys
  • No temperature data for certain regions
  • Wave size keeps getting deleted
  • App doesn't download
  • Need to search for app every time to open
  • Temperatures take a long time to load
  • App does not open or load properly
  • No legend for water temperature
  • App basically says water temperature is the same globally

Requested features

10 requests
  • Ability to place cursor for specific temperature
  • Changeable map temperature scale range
  • Changeable units
  • Larger temperature scale size
  • More detailed ocean floor map
Show 5 more
  • Full earth map view / flat earth map
  • Search feature by city, state, country, or body of water
  • Integration with Google Maps layer
  • Display expected fish presence based on temperature
  • Depth temperature models for divers

In-app purchases

None

Blue Map

No in-app purchases

None

Ocean Water Temperature

No in-app purchases

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 September 27, 2026 and Ocean Water Temperature on September 28, 2026.

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