Comparison

PSLab vs Rock Identifier

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PSLab

Features
Read full description

Pocket Science Lab (PSLab) comes with an array of instruments including Oscilloscope, Multimeter, Waveform Generator, Frequency Counter, Programmable Voltage, Current Source and many more. With instruments such as the Luxmeter and Barometer you can also do measurements directly using your phone sensors. Other instruments can use the PSLab Open Hardware extension that combines many devices in one. PSLab enables you to do science experiments without the need for programming. You can store and export the data and show it on a map. The app is created by the FOSSASIA community and developed entirely as Open Source ensuring privacy and long-term support.

About

Rock Identifier

Instantly identify rocks, minerals, and crystals by taking a photo. Get clear details, save your discoveries, and create personalized profiles for your collection. Explore traditional crystal interpretations for learning and enjoyment.

Highlights
  • AI-powered rock identification
  • Detailed identification results
  • Personalized stone collection
  • Customizable rock profiles
  • Traditional crystal interpretations
  • Offline saving of scans
Features
Read full description

Turn any rock-stone you find into a clear, confident answer. You’re walking outside and notice a stone that looks different. You take a photo and, within seconds, you know what it is — whether it’s a rock, a mineral, or a crystal, along with a clear name and helpful details you can actually understand. Rock Identifier:Petra is built for moments like this. Open the app, take a picture, and get a straightforward result without technical language or exaggerated claims. Each identification shows how confident the result is and offers possible alternatives when relevant. Instead of a single rigid answer, you get context that helps you decide and learn naturally as you go. Every stone you scan is saved automatically. Photos, categories, dates, and confidence levels are organized into your personal collection, turning casual discoveries into something meaningful over time. Beyond simple history, Rock Identifier lets you create detailed profiles for meaningful stones. Give each rock a name, add multiple photos, write notes, or record voice notes, and attach past identifications for clear context. With fields like origin, value, rarity, and custom tags, your collection becomes organized, searchable, and personal — not just a list of scans. For those interested in crystals, the app also includes information about traditional and cultural interpretations related to balance, calm, and intention. This section is designed for learning and exploration, reflecting how crystals are commonly viewed in collecting and spiritual practices, without making medical or health claims. Whether you’re curious on a walk, collecting stones, exploring with your kids, or simply enjoying nature more closely, Rock Identifier fits naturally into your day without getting in the way. No clutter. No pressure. No pretending to be perfect. Just a clear, practical tool you’ll come back to whenever you find another stone worth identifying. Support feedback@novalift.me Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PSLab4 screens
Rock Identifier4 screens

Verdict

The call

The clearest difference is in-app purchases: PSLab at none against Rock Identifier's 4. PSLab also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Rock Identifier sells 4 in-app purchases, starting at $4.99 per 7 days. PSLab asks for nothing beyond the download.

UpkeepUpdate frequency

PSLab ships an update fortnightly, Rock Identifier every 9 days. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 7 level
PSLab versus Rock Identifier: the parameters behind the verdict, then further details
ParameterPSLabRock Identifier
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyFortnightlyEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size32 MB37 MB
Age rating4+4+
DeveloperFOSSASIAMUSTAFA RESIT SAHIN

In-app purchases

None

PSLab

No in-app purchases

4 purchases

Rock Identifier

Subscriptions4
  • Unlimited Rock Identification3 Days trial$4.997 Days
  • Unlimited Rock Identification$7.991 Month
  • Unlimited Rock Identification$9.997 Days
Show 1 more
  • Unlimited Rock Identification$39.991 Year

Questions

Is PSLab free?
PSLab is free to download, with no in-app purchases.
Is Rock Identifier free?
Rock Identifier is free to download, with in-app purchases available.
Do PSLab or Rock Identifier have ads?
Neither PSLab nor Rock Identifier shows ads.
Which is updated more often, PSLab or Rock Identifier?
PSLab ships an update fortnightly, and Rock Identifier every 9 days. Most recently, PSLab was updated on October 17, 2026 and Rock Identifier on October 7, 2026.

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