# NDAWN Inversion vs Global Predictor

The clearest difference is rating: NDAWN Inversion at 4.7 against Global Predictor's 3.5. NDAWN Inversion also leads on in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.5). Global Predictor's advantage is update cadence (every 8 months vs every 19 months) and chart position (#167 vs unranked). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Global Predictor sells 2 in-app purchases, starting at $5.99 per month. NDAWN Inversion asks for nothing beyond the download.

NDAWN Inversion holds the better App Store score, 4.7 against 3.5. Both are backed by a comparable volume of ratings — 7 and 11 respectively.

NDAWN Inversion ships an update every 19 months, Global Predictor every 8 months. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | NDAWN Inversion | Global Predictor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7 ratings)](https://appshunter.io/ios/app/ndawn-inversion/id1385751300/reviews)** | [3.5 (11 ratings)](https://appshunter.io/ios/app/global-predictor/id6498934220/reviews) |
| Number of ratings | 7 | **11** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 8 months** |
| Monetization | **Free** | Freemium |
| Best chart rank | — | **#167** |
| Size | 28 MB | 12 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [North Dakota State University](https://appshunter.io/developer/493125863) | [Weather 20/20 LLC](https://appshunter.io/developer/1741992117) |

## What reviewers say

### NDAWN Inversion

[App page](https://appshunter.io/ios/app/ndawn-inversion/id1385751300)

This app monitors real-time weather data to detect air temperature inversions, which can affect spray drift. It sends push notifications when spraying may no longer be advisable, helping users comply with label instructions. Essential weather data like wind speed and temperature are also provided.

**Highlights:** Real-time inversion detection, Push notifications for spraying advisories, Wind speed and temperature data, Updates every 5 minutes, Supports selected stations

**Features:** macOS Compatibility

**In-app purchases:** none


### Global Predictor

[App page](https://appshunter.io/ios/app/global-predictor/id6498934220)

**Currently charting:** #167 Top Grossing · Weather (US App Store)

Get reliable, long-range weather forecasts up to six months in advance for planning travel, events, and outdoor activities. Utilizes a unique recurring cycle methodology for accurate predictions, with an interactive map to view forecasts for any global location.

**Highlights:** 6-month global forecasts, Interactive world map, Lezak's Recurring Cycle (LRC) methodology, User-friendly interface, Planning for travel and events, Detailed daily forecasts

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Global Predictor Pro Monthly | $5.99 | per month |
| Global Predictor Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is NDAWN Inversion free?

NDAWN Inversion is free to download, with no in-app purchases.

### Is Global Predictor free?

Global Predictor is free to download, with in-app purchases available.

### Which has better reviews, NDAWN Inversion or Global Predictor?

NDAWN Inversion is rated higher. NDAWN Inversion averages 4.7 out of 5 from 7 ratings, while Global Predictor averages 3.5 from 11 ratings.

### Do NDAWN Inversion or Global Predictor have ads?

Neither NDAWN Inversion nor Global Predictor shows ads.

### Which is updated more often, NDAWN Inversion or Global Predictor?

NDAWN Inversion ships an update every 19 months, and Global Predictor every 8 months. Most recently, NDAWN Inversion was updated on June 1, 2026 and Global Predictor on September 21, 2026.

---

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