CloudLockWhat it means
Every cloud shows the weather it usually brings: fair, changing, rain or snow, thunderstorms or danger.
☁️ App locker for Android
Name the cloud.
Name the cloud.
Unlock your app.
Look up from your phone, literally. CloudLock turns every urge to scroll into a glance at the sky: a locked app shows a cloud photo and four names. Get it right and you’re in; get it wrong and you learn the difference, and what weather it means.
Coming soon onGoogle Play
See how it works
Free · no ads · works offline · Android 8 and later · Privacy · Terms
For learning, not forecasting
Clouds hint at the weather, but only your local weather service can warn you about storms. If a funnel, wall or shelf cloud is heading your way, go indoors. CloudLock says this in setup and on every cloud.
How CloudLock works
An app blocker with its head in the clouds. Five seconds of sky-reading before every scroll.
Lock the apps that pull you in
Pick any Android app: social media, video, games. Choose how many new clouds to learn each day.
Learn a few clouds a day
Short lessons with real photos, how high each cloud forms, what it’s made of, the weather it brings and what it’s mistaken for.
Name it to get in
Open a locked app and CloudLock asks about one of your clouds. Right: the app opens for 10 minutes. Wrong: a short pause to learn the difference.
Read the sky like a pro
The hardest part of cloud spotting is telling similar clouds apart, so that’s what CloudLock drills. Like the classic test meteorologists use: hold your arm out and compare the cloudlets to your hand.
Cirrocumulus
Grains smaller than your fingertip, with no shading. High, icy and short-lived.
Altocumulus
Cloudlets about a thumb wide, shaded on one side. On humid mornings, storms may follow.
Stratocumulus
Clumps bigger than your fist, joined in a lumpy layer. The most common cloud on Earth.
Everything a cloud spotter needs
Field clues
Height, shape, ice or water, when it appears, and the one feature that gives each cloud away.
Real look-alikes
The wrong answers are the clouds people actually confuse, and a wrong pick explains how to tell them apart.
Spaced review
Each cloud returns after 1, 3, 7, 14 and 30 days until it’s mastered. Miss one and it starts again tomorrow.
Collect all 36
Fill your collection, build a daily streak, earn milestones and grow your Sky IQ from 60 to 160.
Private by design
No account, no ads, no analytics. Everything stays on your phone and works offline.
See it in action
Real photos from Flickr photographers, credited in every image.
36 clouds to learn
From the WMO International Cloud Atlas, the reference meteorologists use.
10 main types
The building blocks
Cumulus, stratocumulus, stratus, nimbostratus, altostratus, altocumulus, cirrus, cirrocumulus, cirrostratus and cumulonimbus.
11 species
The family details
Fair-weather and towering cumulus, mares’ tails, lenticular and turreted altocumulus, the bald cumulonimbus and the anvil.
15 special & rare
Bucket-list skies
Mammatus, shelf, roll, wall and funnel clouds, virga, fallstreak holes, wave clouds, asperitas, noctilucent and mother-of-pearl clouds.
Free, with an optional upgrade
No subscription. Pay once if you want more, or never.
| Free | CloudLock Plus (one-time) | |
|---|---|---|
| Locked apps | Up to 2 | Unlimited |
| Clouds | The 10 main types | All 36, including species and special clouds |
| Lessons, reviews, streaks | ✓ | ✓ |
| Ads or tracking | None | None |
Questions
What is CloudLock?
CloudLock is an app locker for Android. When you open an app you locked, it shows a cloud photo with four names, usually including its real look-alikes. Name it correctly and the app opens for 10 minutes.
Which clouds will I learn?
36 clouds from the WMO International Cloud Atlas: the 10 main types (cumulus, stratus, cirrus, cumulonimbus and the rest), their best-known species such as lenticular and towering cumulus, and special clouds like mammatus, shelf clouds, noctilucent clouds and fallstreak holes.
Can CloudLock forecast the weather?
No. It teaches what clouds usually mean, which is useful and fun, but only your local weather service can warn you about storms. In stormy weather, take shelter.
Is CloudLock free?
Yes. The free version locks up to 2 apps and teaches the 10 main cloud types. CloudLock Plus is an optional one-time purchase that adds unlimited apps and 26 more clouds. No ads, no subscription.
Does CloudLock collect my data?
No. Everything stays on your phone: no account, no analytics and no ads. It works offline. Read the privacy policy.
Trade a scroll for the sky
CloudLock is almost ready for Google Play.
Coming soon onGoogle Play
