Comparison

Kelpulator vs Spearo Vision

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

Head to head
About

Kelpulator

Read full description

Kelpulator helps offshore anglers track kelp and fish, predict drift, and share intel with their crew. Currently covering Point Conception to Ensenada, with more regions coming soon. Mark kelp by dropping a pin or drifting alongside it, then let wind and current forecasts predict where it moves so you can navigate back and find the same paddy hours or days later. Key features: - Kelp drift prediction with land-masking and adjustable windage per paddy - Fish & kelp tracking with distance and bearing from your current position - Ocean data overlays: SST, chlorophyll, wind forecasts (48h + 7-day), surface currents, swell, and bathymetry - Spot forecasts: tap any location to see 1-3 hour interval wind and swell conditions out to 7 days - Tides & moon phases: on-device tidal predictions and scrollable moon phase calendar - Crews: share marks and reports with private or public groups - Reports: rich text, up to 10 photos, 90-second voice memos, and emoji reactions - Direct messaging with crew members - Offline maps: downloadable region packs for Southern California and Baja - Measurement tool: tap the map to measure distance and bearing between points - Time slider: scrub forward through wind and current forecasts - Guided tutorial with demo items for new users - Filtering & sorting by status, type, distance, or date - Metric / Imperial units - Light & dark themes Kelpulator Pro is an auto-renewing annual subscription ($29.99/year) that unlocks wind, current, swell, and bathymetry layers, higher mark limits, and direct messaging. Payment is charged to your Apple ID at confirmation of purchase and renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kelpulator.com/privacy

About

Spearo Vision

Get AI-powered underwater visibility predictions and comprehensive marine data to plan your dives. Receive smart alerts for optimal conditions and leverage community-driven reports for accurate insights.

Highlights
  • AI-powered visibility forecasts
  • 7-day marine condition predictions
  • Real-time tide charts
  • Solunar activity tracking
  • Customizable smart alerts
  • Community condition reports
Features
Read full description

Should I go diving today? Spearo Vision Weather answers that question with precision. Get AI-powered visibility predictions, comprehensive marine conditions, and smart alerts that help you plan the perfect dive every time. 7-DAY VISIBILITY FORECASTS Our machine learning models analyze water clarity, weather patterns, and marine data to predict underwater visibility up to a week ahead. Never waste a dive day on poor conditions again. COMPLETE MARINE INTELLIGENCE - Real-time tide charts and predictions - Swell height, period, and direction - Ocean currents and temperature - Wind speed and direction - Barometric pressure trends SOLUNAR ACTIVITY TRACKING Peak fish feeding times based on moon phases and solar positions. Know when the fish are most active to maximize your success rate. SMART CUSTOM ALERTS Set personalized triggers for ideal conditions. Get notified when visibility exceeds your threshold, tides align with your preferences, or weather windows open up. COMMUNITY-DRIVEN ACCURACY Thousands of spearfishers worldwide contribute real-time condition reports, helping refine our predictions and giving you ground truth from the water. PART OF THE SPEARO ECOSYSTEM Seamlessly connects with Spearo Tracker (catch logging) and Spearo Apnea (training) for the complete spearfishing experience. PERFECT FOR: - Spearfishers planning weekend trips - Freedivers seeking optimal visibility - Charter captains choosing dive sites - Underwater photographers timing shoots Join the growing community of informed divers who never guess about conditions again. Download Spearo Vision Weather and dive with confidence. Subscription required for premium features including extended forecasts and custom alerts.

Screenshots

Kelpulator4 screens
Spearo Vision4 screens

Verdict

The call

Kelpulator and Spearo Vision are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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. Kelpulator sells 1 in-app purchase, starting at $29.99 per year and Spearo Vision sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Kelpulator versus Spearo Vision: the parameters behind the verdict, then further details
ParameterKelpulatorSpearo Vision
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequency—Every 5 days
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size50 MB63 MB
Age rating4+17+
DeveloperAlan DaCostaVISIVO

In-app purchases

1 purchases

Kelpulator

Subscriptions1
  • Kelpulator Pro$29.991 Year
3 purchases

Spearo Vision

Subscriptions3
  • Vision Pro Monthly2 variants$4.991 Month
  • Vision Pro Annual (Tracker)$39.991 Year
  • Vision Pro Annual$39.991 Year

Questions

Is Kelpulator free?
Kelpulator is free to download, with in-app purchases available.
Is Spearo Vision free?
Spearo Vision is free to download, with in-app purchases available.
Do Kelpulator or Spearo Vision have ads?
Neither Kelpulator nor Spearo Vision shows ads.

Other comparisons