CloudWatcher vs Physics Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CloudWatcher
Identify cloud types using AI or manual input. Save photos with location data, share them, and deepen your knowledge with an encyclopedia and quizzes. An AI chatbot can answer your cloud-related questions.
- AI cloud identification
- Manual cloud type selection
- Save cloud photos with location
- Share photos via social media
- Cloud encyclopedia
- Cloud quizzes
- AI chatbot for cloud questions
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Look up at the sky, with new eyes. CloudWatcher is an all-in-one cloud observation app: identify clouds with AI, learn from a built-in field guide, take quizzes, log every sky you see, and never miss a rainbow or sunset. Features Cloud AI Identification Take a photo and let AI identify it across 10+ cloud types (cirrus・cumulus・stratus and more) with explanations of weather conditions and how to spot each one. AR Labeling (New) Point your camera at the sky and tap any cloud. AI labels stick in 3D space so you can compare multiple cloud types at once. Today's Sky Live Activity (New) Your Lock Screen and Dynamic Island show what's likely in today's sky in chronological order: rainbows・sunsets・sunrises・halos・cirrus days・stargazing nights. Smart Sky Alerts (New) Forecast and sun position predict moments like "Rainbow likely" or "Beautiful sunset expected" and notify you just in time. Each alert type can be toggled. Cloud Field Guide The 10 WMO cloud genera with photos・characteristics・meteorological context. Jump straight from the guide into capture mode. Cloud Quizzes Three difficulty levels (beginner・intermediate・advanced) to sharpen your observation skills. Map and Statistics See all your captures on a map. Track your most-photographed cloud types over time. AI Chat Ask questions about clouds and weather using your own photos as context. For ・Sky lovers and amateur meteorologists ・Kids' science projects and classroom use ・Studying for meteorology exams ・Capturing memorable skies on travels Compatibility ・iOS 17.6 or later ・Live Activity and Dynamic Island (iPhone 14 Pro and newer) ・AR Labeling requires A12 Bionic or newer ・English and Japanese Weather powered by Apple WeatherKit. Cloud identification powered by cloud AI.
Physics Calc
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With this application you can: Calculate volume and area of geometric figures. Calculate final speed, initial speed, distance, time and accelerate the varied rectilinear uniform motion (M.U.R.V.), shows the result and clears the equation. Convert units of distance, volume, area, power, energy, weight, radiation, sound, pressure, fuel consumption, time, angle, density, among others. Calculate the hypotenuse and the legs of the right triangle by Pythagoras and any triangle by theorem of cosines and sines. Calculate the square perfect binomial in thousandths of a second It is a design as I would like an application when I was a student, I open it, enter the data, it solves the exercises instantly and that's it.
Screenshots
Verdict
The clearest difference is device support: Physics Calc at 3 against CloudWatcher's 1. Physics Calc also leads on iOS requirement (12.1 vs 17.6). On price, update cadence, 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
CloudWatcher costs $0.99 and Physics Calc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CloudWatcher ships an update every 3 weeks, Physics Calc every 5 weeks. The most recent releases landed on September 29, 2026 and October 5, 2026 respectively.
| Parameter | CloudWatcher | Physics Calc |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 12.1 — better |
| Further details — not scored | ||
| Size | 12 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | icot | Isaac Cabello |
In-app purchases
CloudWatcher
No in-app purchases
Physics Calc
No in-app purchases









