Comparison

Sea Shell Identifier vs Periodic Play

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

Head to head
About

Sea Shell Identifier

Identify seashells instantly using AI. This app provides detailed biological insights and allows you to manage your personal collection of coastal finds with location tagging.

Highlights
  • AI photo identification
  • 1000+ species database
  • Expert biological insights
  • Personal collection management
  • Location tagging for finds
  • Detailed species profiles
Features
Read full description

Unlock the mysteries of the shoreline with Sea Shell Identifier - Scanner, the most comprehensive AI-powered marine guide for your smartphone. Whether you're a casual beachcomber or a dedicated marine biology enthusiast, our advanced scanning technology turns every coastal walk into an educational adventure. INSTANT AI IDENTIFICATION Simply snap a photo of any shell you find, and our powerful AI will identify it in seconds. With a database covering over 1,000 verified species, you’ll get accurate results for everything from common beach finds to rare specimens. EXPERT BIOLOGICAL INSIGHTS Go beyond the name. Learn the "how" and "why" behind every shell. Access detailed descriptions, habitat information, and fascinating biological facts curated by marine experts. It’s like having a marine biologist in your pocket. PERSONAL COLLECTION MANAGEMENT Keep a digital log of your beachcombing history. Catalog your finds, save the GPS location of where you found them, and build a beautiful personal collection of your coastal treasures. KEY FEATURES: - Advanced AI photo recognition technology. - Database of 1,000+ marine species. - Detailed species profiles and expert insights. - Personal collection tracker with location tagging. - High-quality imagery for easy visual comparison. PREMIUM FEATURES INCLUDE: - Unlimited shell identification - Advanced AI recognition - Complete species database - Detailed marine information - Collection organization tools - Export and sharing capabilities - Priority customer support Download ShellScanner today and unlock the mysteries of your beach discoveries! Turn every beach walk into an exciting exploration with expert shell identification at your fingertips. Join a community of nature lovers and beachcombers. Download Sea Shell Identifier - Scanner today and transform your next beach trip into a mission of discovery! Privacy Policy: https://sites.google.com/view/seashellidentifier/privacy-policy Terms of Use: https://sites.google.com/view/seashellidentifier/terms-conditions

About

Periodic Play

Features
Read full description

Discover the fun side of chemistry with Periodic Play — the card game that turns the periodic table into hands-on play. Match real elements, form real compounds, and watch chemistry come alive with every capture. EVERY CAPTURE IS A DISCOVERY Complete a compound and watch its elements collide and fuse in a delightful animation — 2 hydrogens and 1 oxygen really do crash together to make H2O! Atom balls use the same standard colors chemists use, every molecular ratio is scientifically accurate, and each of the 23 compounds comes with a fun real-life fact: rust is what makes Mars red, cows burp methane, and your brain is burning glucose right now. THREE WAYS TO PLAY Explore — No timer, no opponent. Take your time, form compounds, and soak up the science at your own pace. Perfect for first-time chemists. 1 Player vs Bot — Race a friendly Bot with three difficulty levels. Capture compounds before the countdown runs out! 2 Players — Face-to-face on one device, each player on their own side of the screen. Same table, same cards — fastest thinker wins. 74 CARDS, REAL CHEMISTRY 51 element cards — Hydrogen, Oxygen, Carbon, Sodium, Iron and more 23 compound cards — Water, Table Salt, Carbon Dioxide, Glucose, Sulfuric Acid and more Spot a table where nothing can be made? Call a deadlock for bonus points — but a wrong call will cost you! LEARN WHILE YOU PLAY A built-in interactive tutorial teaches everything in six bite-size lessons — how to read formulas, why H2 needs two hydrogen cards, when to call a deadlock, and more. No walls of text — just watch and play. Perfect for: Primary and lower-secondary students meeting the elements for the first time Families who love science night Classrooms, science clubs and homeschoolers Explore and 2 Players modes are completely free, forever. A single optional purchase unlocks 1 Player vs Bot. No ads. No accounts. Everything works offline — internet is only needed for the optional purchase.

Screenshots

Sea Shell Identifier4 screens
Periodic Play4 screens

Verdict

The call

Sea Shell Identifier and Periodic Play are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Sea Shell Identifier sells 3 in-app purchases, starting at $4.99 per 7 days and Periodic Play sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sea Shell Identifier ships an update every 3 weeks, Periodic Play every 2 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

ScorecardNo meaningful differences
Sea Shell Identifier versus Periodic Play: the parameters behind the verdict, then further details
ParameterSea Shell IdentifierPeriodic Play
PriceFreeFree
Rating3.9 (169 ratings) — better—
Positive reviews13.6% of reviews—
Number of ratings169 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size60 MB5 MB
Age rating4+4+
DeveloperAPPMERGE TEKNOLOJI LIMITED SIRKETIS and S Forever Pty Ltd

Bugs and requests

Sea Shell Identifier

Reported bugs

6 issues
  • App closes immediately when trying to take a picture
  • App uses the first picture for subsequent scans instead of the newest
  • App requires purchase again after one hour
  • Camera function does not work
  • Scans are glitchy
Show 1 more
  • Blurry pictures from the camera

Requested features

7 requests
  • Allow trying before buying
  • Lower subscription price
  • Improve accuracy of shell identification
  • Allow more free scans
  • Fix app closing issue
Show 2 more
  • Fix glitchy scans
  • Allow cancellation of subscription

Periodic Play

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Sea Shell Identifier

Subscriptions2
  • Weekly Premium$4.997 Days
  • Yearly Premium$12.991 Year
One-time1
  • Lifetime Premium$9.99
1 purchases

Periodic Play

One-time1
  • 1 Player vs Bot$1.99

Questions

Is Sea Shell Identifier free?
Sea Shell Identifier is free to download, with in-app purchases available.
Is Periodic Play free?
Periodic Play is free to download, with in-app purchases available.
Do Sea Shell Identifier or Periodic Play have ads?
Neither Sea Shell Identifier nor Periodic Play shows ads.
Which is updated more often, Sea Shell Identifier or Periodic Play?
Sea Shell Identifier ships an update every 3 weeks, and Periodic Play every 2 weeks. Most recently, Sea Shell Identifier was updated on November 4, 2026 and Periodic Play on October 31, 2026.

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