Comparison

SkySort vs Nimbus

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

Head to head
About

SkySort

Instantly identify cloud types using AI-powered image recognition. Snap a photo of the sky to discover detailed information about various cloud formations and their associated weather conditions. Save your observations and track your cloud spotting progress.

Highlights
  • AI cloud type recognition
  • Photo import and capture
  • Detailed cloud information
  • Weather data integration
  • Observation saving and tracking
  • Offline capability
  • Cloud encyclopedia
Features
Read full description

Point your camera at the sky and know what you’re looking at. SkySort uses on‑device AI to identify clouds in seconds — no internet required — then logs each sighting with the weather and location in your own private sky journal. Whether you’re a weather watcher, hiker, photographer, student, or simply sky‑curious, SkySort helps you notice more and learn as you go. IDENTIFY IN SECONDS • Snap a photo or import one from your library — SkySort recognizes 12 sky conditions: Cumulus, Cumulonimbus, Stratus, Stratocumulus, Nimbostratus, Altocumulus, Altostratus, Cirrus, Cirrocumulus, Cirrostratus, contrails, and clear sky. • Every result includes a confidence score and an at‑a‑glance quality rating, so you always know how sure the model is. • Identification runs entirely on your device — fast, offline, and private. LEARN THE SKY • A built‑in encyclopedia covers all 12 cloud types: how they form, the weather they signal, and how to tell look‑alikes apart. • Explore 25 weather terms and 6 special phenomena — halos, sun dogs, iridescence, virga, crepuscular rays, and lenticular clouds — with example photos. • Not sure what you’re seeing? The ID Helper walks you through a few simple questions to narrow it down. BUILD YOUR SKY JOURNAL • Every observation is saved with its photo, type, confidence, date, and place. • SkySort automatically records the weather the moment you save — temperature, wind, humidity, pressure, visibility, UV, and cloud cover. • Search, filter, and sort your history, and see all your sightings on a map. • Track your trends: most‑common clouds, average confidence, and recent activity. SYNC, SHARE & EXPORT • Your journal syncs across iPhone and iPad through your private iCloud. • Share a cloud with a ready‑made caption — your location is never included. • Export everything to CSV or a polished PDF report, in Metric or Imperial units. PRIVATE BY DESIGN • Photos are analyzed on your device and are never uploaded to a server for identification. • Your observations live in your own iCloud, not on our servers. • Shared images and captions never include your GPS coordinates. Download SkySort and start reading the sky. — Weather data provided by Weather. Cloud identifications are AI predictions and may not always be exact.

About

Nimbus

Features
Read full description

Can you tell a nimbostratus from an altostratus? Nimbus makes cloud identification genuinely fun — a fast multiple-choice quiz backed by a complete pocket field guide for all 10 cloud types. — KEY FEATURES — • Multiple-choice quiz — read a cloud description, then pick the correct cloud name from four options with instant right/wrong feedback • All 10 major cloud types — cumulus, cirrus, stratus, cumulonimbus, altocumulus, altostratus, cirrostratus, cirrocumulus, nimbostratus, and stratocumulus • Streak counter — a live flame tracks your current run of correct answers; break your best streak record • Full field guide — tap any cloud in the Learn tab for its altitude range, appearance details, and weather forecast hints • Personal stats — best streak, total questions answered, accuracy percentage, and a correct/total progress bar • Persistent progress — stats are saved automatically between sessions so your records are never lost • 100% offline — no internet required, works anywhere you can see the sky Whether you're a student studying meteorology, a pilot brushing up on weather literacy, a hiker reading the sky for incoming storms, or simply someone who looks up and wonders — Nimbus gives you the knowledge to name what you see. Download free and start your streak today. — Nimbus Cloud Quiz PREMIUM — A Nimbus Cloud Quiz Premium subscription unlocks the full app experience: all 10 cloud types with their complete field guide entries, unlimited quizzes with live streak tracking, detailed accuracy stats, and an entirely ad-free, offline environment — so you can focus on learning the sky without interruption. Subscription options: • Weekly — $9.99 / week • Yearly — $49.99 / year (includes a 3-day free trial) Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the period. Manage or cancel anytime in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://pnkl26.web.app/privacy-policy

Screenshots

SkySort4 screens
Nimbus3 screens

Verdict

The call

The clearest difference is in-app purchases: SkySort at none against Nimbus's 2. Nimbus's advantage is update cadence (fortnightly vs monthly). On price, ads, device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Nimbus sells 2 in-app purchases, starting at $9.99 per 7 days. SkySort asks for nothing beyond the download.

UpkeepUpdate frequency

SkySort ships an update monthly, Nimbus fortnightly. The most recent releases landed on October 30, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 7 level
SkySort versus Nimbus: the parameters behind the verdict, then further details
ParameterSkySortNimbus
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size13 MB1 MB
Age rating4+4+
DeveloperAndrew CarlsonLinh Phan Nhat Khanh

In-app purchases

None

SkySort

No in-app purchases

2 purchases

Nimbus

Subscriptions2
  • Nimbus Cloud Quiz Weekly$9.997 Days
  • Nimbus Cloud Quiz Yearly3 Days trial$49.991 Year

Questions

Is SkySort free?
SkySort is free to download, with no in-app purchases.
Is Nimbus free?
Nimbus is free to download, with in-app purchases available.
Do SkySort or Nimbus have ads?
Neither SkySort nor Nimbus shows ads.
Which is updated more often, SkySort or Nimbus?
SkySort ships an update monthly, and Nimbus fortnightly. Most recently, SkySort was updated on October 30, 2026 and Nimbus on October 15, 2026.

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