# METIS 4 vs Storm Distance Tracker

The clearest difference is in-app purchases: METIS 4 at none against Storm Distance Tracker's 4. METIS 4 also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Storm Distance Tracker's advantage is update cadence (every 7 months vs every 26 months). On price and device support there is nothing between them.

Both are free to download. Storm Distance Tracker sells 4 one-off in-app purchases. METIS 4 asks for nothing beyond the download.

METIS 4 ships an update every 26 months, Storm Distance Tracker every 7 months. Both last shipped on October 9, 2026.

## The numbers

| Metric | METIS 4 | Storm Distance Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (101 ratings)](https://appshunter.io/ios/app/storm-distance-tracker/id1123064491/reviews)** |
| Number of ratings | — | **101** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 26 months | **Every 7 months** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 31 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CROSS Zlin, a.s.](https://appshunter.io/developer/1068448316) | [DOUBLE U s.r.o.](https://appshunter.io/developer/331787042) |

## What reviewers say

### METIS 4

[App page](https://appshunter.io/ios/app/metis-4/id1068448317)

**Features:** macOS Compatibility

**In-app purchases:** none


### Storm Distance Tracker

[App page](https://appshunter.io/ios/app/storm-distance-tracker/id1123064491)

Measure the distance to a storm by timing the interval between seeing lightning and hearing thunder. This tool uses the difference in the speed of light and sound to provide an estimated distance.

**Highlights:** Calculate storm distance, Uses lightning and thunder timing, Calculates based on speed of light and sound, Simple tap interface

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Remove Ads | $9.99 | one-time |


## Frequently asked questions

### Is METIS 4 free?

METIS 4 is free to download, with no in-app purchases.

### Is Storm Distance Tracker free?

Storm Distance Tracker is free to download, with in-app purchases available.

### Do METIS 4 or Storm Distance Tracker have ads?

Storm Distance Tracker shows ads; METIS 4 does not.

### Which is updated more often, METIS 4 or Storm Distance Tracker?

METIS 4 ships an update every 26 months, and Storm Distance Tracker every 7 months. Most recently, METIS 4 was updated on October 9, 2026 and Storm Distance Tracker on October 9, 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.*