Comparison

Nullschool vs mWater Horizon

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

Head to head
About

Nullschool

Visualize global weather, ocean, and pollution data on an interactive map. Explore current conditions, forecasts up to 5 days, and historical data. Discover atmospheric phenomena like hurricanes, jet streams, and pollution spread.

Highlights
  • Interactive animated global map
  • Wind, ocean, and pollution layers
  • Current conditions and 5-day forecasts
  • Historical data access
  • Aurora and wildfire tracking
  • Subscription for extra features
Features
Currently charting
Read full description

The official app of the popular website earth.nullschool.net! Explore wind, weather, ocean, and pollution conditions, as forecast by supercomputers, on an interactive animated map. Numerous features are available: - Current conditions, forecasts up to 5 days (depending on the data source), and historical data going back many years - Physical layers: wind, temperature, relative humidity, wet bulb temperature, precipitation, MSLP, CAPE, and more - Chemistry and aerosol layers: PM 2.5, CO2, sulfate, and other pollutants - Ocean layers: waves, currents, swells, sea surface temps, coral bleaching - Aurora - Wildfires Explore Earth's atmosphere and oceans wherever your curiosity takes you: - Watch how hurricanes and typhoons form and pull heat from the ocean - See the jet stream and polar vortex - Follow the Kuroshio, Alguhas, and Gulf Stream - Learn how pollution spreads across the globe This app offers paid subscriptions so you can help Nullschool keep the lights on and develop new features. Plus, you get some neat extras: - Curate a gallery of favorites - Save and share screenshots - Generate QR codes for easy linking Who knows what you're going to find?

About

mWater Horizon

This app provides a daily updated map of river flood risk and heavy rain forecasts, helping communities prepare for seasonal floods. It offers a 10-day outlook for specific locations, including potential flood depth and peak days, with optional notifications for rising risk.

Highlights
  • Live river flood risk map
  • Heavy rain and storm imagery
  • Track important locations
  • 10-day flood outlook
  • Customizable notifications
  • Multilingual support
Features
Read full description

mWater Horizon shows when rivers near the places you care about may flood — and when heavy rain is coming — so you have time to prepare. Made for communities that live with seasonal floods, Horizon turns global satellite forecasts into a clear, local picture: a live map of river-flood risk for the days ahead, right down to your exact spot. WHAT YOU CAN DO • See river-flood risk on a live map — floodplains plus Watch and Warning areas, updated daily • Check heavy-rain risk on a dedicated rainfall map, with live storm (cloud-top) imagery • Track the places that matter — home, the farm, family — and check them all at a glance • Open any place for a 10-day outlook: how likely flooding is, how deep it could get, and the day it peaks • Get a notification when risk rises at a place you follow • Use it in your language — English, Français, Português, Español, हिन्दी, বাংলা, Kiswahili, العربية, Tiếng Việt and many more HOW IT WORKS Horizon combines satellite flood and rainfall forecasts — including Copernicus Emergency Management Service data — to estimate river-flood and heavy-rain risk almost anywhere, even where there are no local river gauges. It's built to stay fast and clear on a basic phone and a slow connection. GOOD TO KNOW • Free to use • Add as many places as you like • No account needed to explore the map — sign in only to receive alerts IMPORTANT Horizon provides flood-risk information to help you prepare. It is not an official flood warning — only national or regional authorities issue official warnings. Always follow the guidance of your local authorities. Horizon is made by mWater, a nonprofit working to help people everywhere reach safe water and reliable environmental information.

Screenshots

Nullschool4 screens
mWater Horizon4 screens

Verdict

The call

The clearest difference is in-app purchases: mWater Horizon at none against Nullschool's 3. Nullschool's advantage is ratings volume (40 vs 2) and chart position (#160 vs unranked). On price, rating, review sentiment and update cadence 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

Both are free to download. Nullschool sells 3 in-app purchases, starting at $2.99 per month. mWater Horizon asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Nullschool against 5.0 for mWater Horizon. That said, the two scores are not equally well evidenced: Nullschool has 40 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 30, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 7 level
Nullschool versus mWater Horizon: the parameters behind the verdict, then further details
ParameterNullschoolmWater Horizon
PriceFreeFree
Rating5.0 (40 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings40 — better2
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
Best chart rank#160 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size31 MB11 MB
Age rating4+4+
DeveloperNullschool Technologies Inc.mWater Foundation Inc

Customer experience

Nullschool

All ratings27 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews17 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

mWater Horizon

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Nullschool

Subscriptions3
  • Monthly Plan$2.991 Month
  • Annual Plan$29.991 Year
  • Friends of Nullschool$49.991 Year
None

mWater Horizon

No in-app purchases

Questions

Is Nullschool free?
Nullschool is free to download, with in-app purchases available.
Is mWater Horizon free?
mWater Horizon is free to download, with no in-app purchases.
Which has better reviews, Nullschool or mWater Horizon?
Nullschool and mWater Horizon are both rated 5.0 out of 5 on the App Store, from 40 and 2 ratings respectively.
Do Nullschool or mWater Horizon have ads?
Neither Nullschool nor mWater Horizon shows ads.
Which is updated more often, Nullschool or mWater Horizon?
Nullschool ships an update monthly, and mWater Horizon monthly. Most recently, Nullschool was updated on October 30, 2026 and mWater Horizon on October 10, 2026.

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