Comparison

Slug Finder vs Raid Analyser

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

Head to head
About

Slug Finder

Discover and identify nudibranchs and sea slugs along California's Central Coast. Features visual filters, detailed species profiles, and an offline sightings log with geotagging. Includes educational facts and ID quizzes for marine life enthusiasts.

Highlights
  • Visual species identification filters
  • Detailed nudibranch profiles
  • Offline sightings log with geotagging
  • Educational nudibranch facts
  • Species identification quizzes
  • High-resolution images
Features
Read full description

A Field Guide to Nudibranchs and Sea Slugs of California’s Central Coast Explore the extraordinary diversity of nudibranchs and other sea slugs found in the kelp forests, rocky reefs, and tidepools of Monterey Bay and Carmel. This app is designed for scuba divers, tidepoolers, marine biology enthusiasts, and anyone curious about these striking and ecologically important invertebrates. Use visual filters—by size, color, and shape—to help identify species based on external traits. Each profile includes scientific and common names, habitat descriptions, diet, size range, and high-resolution images of adult and juvenile forms when available. Built for field use, the app works fully offline and includes a sightings log with geotagging and note-taking features. Whether you're tracking your observations over time or contributing to local biodiversity monitoring efforts, the app helps you stay organized and informed. The included “Nudibranch facts” section provides accessible explanations of nudibranch evolution, reproduction, defense mechanisms, and sensory biology—perfect for learners at all levels. You’ll also find quiz modes and matching games to test your ID skills. Whether you're conducting a survey dive, photographing tidepool fauna, or just fascinated by the beauty and complexity of sea slugs, this app is your portable reference and learning tool for California’s temperate marine ecosystems.

About

Raid Analyser

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RAID Analyser, a comprehensive training and planning tool designed for recreational divers. Whether you're new to enriched air or an experienced technical diver, this app provides everything you need to dive safely with nitrox. INTERACTIVE NITROX ANALYZER SIMULATOR Practice using a nitrox analyzer in a risk-free virtual environment. Learn proper calibration techniques, gas analysis procedures, and equipment operation before touching the real thing. The realistic simulator teaches you to: • Calibrate your analyzer correctly • Analyze different gas mixtures (EAN28, EAN32, EAN36, EAN40) • Understand analyzer types and their differences • Master proper inlet and dial adjustments • MOD Calculator - Calculate Maximum Operating Depth based on oxygen percentage and PPO2 limits • EAD Calculator - Determine Equivalent Air Depth for nitrogen loading • Support for both metric and imperial units COMPREHENSIVE LEARNING CENTER Access professional-quality educational content covering: • What is Nitrox and how it works • Common gas mixtures and their applications • Benefits of nitrox diving • Oxygen toxicity awareness and prevention • MOD calculations explained • Safety procedures and best practices • Analyzer types and maintenance • Gas analysis procedures • Equipment care guidelines • Certification requirements • Gas laws and physics fundamentals • Dive planning strategies FEATURES - Hands-on nitrox analyzer simulation - Real-time gas analysis practice - Professional dive calculators - Multi-language support - Intuitive, user-friendly interface - Offline access to all content

Screenshots

Slug Finder4 screens
Raid Analyser4 screens

Verdict

The call

The clearest difference is update cadence: Raid Analyser at every 9 days against Slug Finder's every 6 months. Raid Analyser also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.4). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Slug Finder ships an update every 6 months, Raid Analyser every 9 days. The most recent releases landed on November 5, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Slug Finder versus Raid Analyser: the parameters behind the verdict, then further details
ParameterSlug FinderRaid Analyser
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.415.1 — better
Further details — not scored
Size80 MB48 MB
Age rating4+4+
DeveloperPhiline MarchettaGianmichele Iaria

In-app purchases

None

Slug Finder

No in-app purchases

None

Raid Analyser

No in-app purchases

Questions

Is Slug Finder free?
Slug Finder is free to download, with no in-app purchases.
Is Raid Analyser free?
Raid Analyser is free to download, with no in-app purchases.
Do Slug Finder or Raid Analyser have ads?
Neither Slug Finder nor Raid Analyser shows ads.
Which is updated more often, Slug Finder or Raid Analyser?
Slug Finder ships an update every 6 months, and Raid Analyser every 9 days. Most recently, Slug Finder was updated on November 5, 2026 and Raid Analyser on October 25, 2026.

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