# Lightning Distance Calculator vs Gemstone Identifier º

The clearest difference is review sentiment: Gemstone Identifier º at 100% against Lightning Distance Calculator's 0%. Gemstone Identifier º also leads on price (Free vs $0.99) and rating (4.2 vs 3.5). Lightning Distance Calculator's advantage is in-app purchases (none vs 2). On ads and iOS requirement there is nothing between them.

Gemstone Identifier º is free to download; Lightning Distance Calculator costs $0.99 up front. Gemstone Identifier º sells 2 in-app purchases, starting at $6.99 per 7 days. Lightning Distance Calculator asks for nothing beyond the download.

Gemstone Identifier º holds the better App Store score, 4.2 against 3.5. That said, the two scores are not equally well evidenced: Gemstone Identifier º has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Lightning Distance Calculator's written reviews are positive against 100% of Gemstone Identifier º's.

Lightning Distance Calculator ships an update every 96 months, Gemstone Identifier º every 5 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Lightning Distance Calculator | Gemstone Identifier º |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.5 (2 ratings)](https://appshunter.io/ios/app/lightning-distance-calculator/id348821275/reviews) | **[4.2 (13 ratings)](https://appshunter.io/ios/app/gemstone-identifier/id6755660796/reviews)** |
| Number of ratings | 2 | **13** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 96 months | **Every 5 months** |
| Monetization | Paid | **Freemium** |
| Size | 7 MB | 64 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [Qualitechnologies LLC](https://appshunter.io/developer/1855338819) |

## What reviewers say

### Lightning Distance Calculator

[App page](https://appshunter.io/ios/app/lightning-distance-calculator/id348821275)

This utility app estimates the distance to lightning strikes by measuring the time between seeing lightning and hearing thunder. It provides calculations in both meters and feet, with adjustable temperature settings for accuracy. Geotagging with GPS data is also included.

**Highlights:** Lightning and thunder time measurement, Distance calculation in meters and feet, Adjustable atmospheric temperature, Geotagging with 3D GPS data

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

**In-app purchases:** none


### Gemstone Identifier º

[App page](https://appshunter.io/ios/app/gemstone-identifier/id6755660796)

Instantly identify gemstones, rocks, and minerals from a photo. Discover their value, history, care instructions, and authenticity. Chat with an AI expert and manage your collection.

**Highlights:** Identify stones by photo, Estimate stone value, Detect fakes, Detailed stone facts, AI gem expert chat, Collection management, Metal detector

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Gemstone Identifier Premium | $34.99 | per year |


## Frequently asked questions

### Is Lightning Distance Calculator free?

Lightning Distance Calculator costs $0.99, with no in-app purchases.

### Is Gemstone Identifier º free?

Gemstone Identifier º is free to download, with in-app purchases available.

### Which has better reviews, Lightning Distance Calculator or Gemstone Identifier º?

Gemstone Identifier º is rated higher. Lightning Distance Calculator averages 3.5 out of 5 from 2 ratings, while Gemstone Identifier º averages 4.2 from 13 ratings.

### Do Lightning Distance Calculator or Gemstone Identifier º have ads?

Neither Lightning Distance Calculator nor Gemstone Identifier º shows ads.

### Which is updated more often, Lightning Distance Calculator or Gemstone Identifier º?

Lightning Distance Calculator ships an update every 96 months, and Gemstone Identifier º every 5 months. Most recently, Lightning Distance Calculator was updated on November 1, 2026 and Gemstone Identifier º on November 5, 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.*