Lightning Distance Calculator vs Gemstone Identifier º
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lightning Distance Calculator
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.
- Lightning and thunder time measurement
- Distance calculation in meters and feet
- Adjustable atmospheric temperature
- Geotagging with 3D GPS data
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"Lightning Distance Calculator" calculates the distance between the position of lightning and Your position. Pressing the button "Lightning" when you see the lightning and “Thunder” when you hear the thunder, the application will automatically calculate the distance in meters and feet. Useful to know the distance from Your position and the storm when You are away from home, for example during a hike or a trip. Features: - Calculation of the distance from lightning / thunderstorm in meters and feet - Adjustable atmospheric temperature for the accurate calculation of the distance - Geotagging using 3D GPS data (latitude, longitude, altitude)
Gemstone Identifier º
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.
- Identify stones by photo
- Estimate stone value
- Detect fakes
- Detailed stone facts
- AI gem expert chat
- Collection management
- Metal detector
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Snap a photo of a gem, rock, crystal or mineral and find out what it is in seconds, with its value, its story and how to care for it. IDENTIFY ANY STONE • Point your camera or pick a photo from your gallery • Get the most likely match with a confidence score, plus look-alikes to compare • Three scan modes: Identify, Value and Real or fake • Snap tips help you take a clear, sharp shot KNOW WHAT IT'S WORTH • An estimate for your own specimen, in your currency • Market price ranges by size and quality • What drives the price, plus rarity, popularity and beauty scores SPOT FAKES BEFORE YOU BUY • A verdict on your photo, with the visible clues behind it • Common imitations and how to tell them apart • Simple home tests you can do safely EVERY DETAIL, DECODED • Key facts: Mohs hardness, chemical formula, crystal system, luster, specific gravity and more • How it formed, how old it is and where it is found • Varieties and look-alikes • Care guide: durability, cleaning steps, storage and what to avoid • Traditions and meanings if you want them: birthstones, zodiac, chakras, clearly labeled as cultural beliefs ASK A GEM EXPERT • Chat with an AI gem expert about any stone: value, care, authenticity or history • Ready-made questions to get started, answers in seconds YOUR COLLECTION • Every scan is saved in your history • Keep your favorite finds in My stones and your dream stones in a wishlist • Add notes: where you found it, what you paid, its weight • Share a specimen label card FREE TO EXPLORE • An encyclopedia of 60 gems, crystals, rocks and fossils with full profiles • Popular gems, real vs fake, birthstones by month, zodiac stones, crystals and traditions, tumbled stones • Practical guides and a stone of the day • A metal detector that uses your phone's magnetic sensor PREMIUM Identification, value estimates, real-or-fake checks and the gem expert are part of Premium (fair use applies). The price and billing period are shown in the app before you subscribe. Payment is charged to your Apple ID. The subscription renews automatically unless it is canceled at least 24 hours before the end of the period. Manage or cancel it anytime in your App Store account settings. GOOD TO KNOW Results come from an AI analysis of your photo and are indicative. For buying, selling or insurance, ask a certified gemologist or a gem lab. Value estimates are not financial advice, and cultural meanings are not medical claims. No account needed. Available in 11 languages. Terms of Use: https://qualitechnologies.com/terms-of-use Privacy Policy: https://qualitechnologies.com/privacy-policy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Lightning Distance Calculator | Gemstone Identifier º |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.5 (2 ratings) | 4.2 (13 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 13 — better |
| Update frequency | Every 96 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 64 MB |
| Age rating | 4+ | 4+ |
| Developer | Gianluca Natalini | Qualitechnologies LLC |
Customer experience
Lightning Distance Calculator
Gemstone Identifier º
In-app purchases
Lightning Distance Calculator
No in-app purchases
Gemstone Identifier º
- Weekly$6.997 Days
- Gemstone Identifier Premium$34.991 Year
Questions
Is Lightning Distance Calculator free?
Is Gemstone Identifier º free?
Which has better reviews, Lightning Distance Calculator or Gemstone Identifier º?
Do Lightning Distance Calculator or Gemstone Identifier º have ads?
Which is updated more often, Lightning Distance Calculator or Gemstone Identifier º?
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