# Nullschool vs mWater Horizon

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.

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.

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.

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

## The numbers

| Metric | Nullschool | mWater Horizon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (40 ratings)](https://appshunter.io/ios/app/nullschool-explore-weather/id6748462114/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/mwater-horizon/id6780894830/reviews) |
| Number of ratings | **40** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Freemium | **Free** |
| Best chart rank | **#160** | — |
| Size | 31 MB | 11 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nullschool Technologies Inc.](https://appshunter.io/developer/1807907924) | [mWater Foundation Inc](https://appshunter.io/developer/1161954150) |

## What reviewers say

### Nullschool

[App page](https://appshunter.io/ios/app/nullschool-explore-weather/id6748462114)

**Currently charting:** #160 Top Free · Weather (US App Store)

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:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $2.99 | per month |
| Annual Plan | $29.99 | per year |
| Friends of Nullschool | $49.99 | per year |


### mWater Horizon

[App page](https://appshunter.io/ios/app/mwater-horizon/id6780894830)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

---

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