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Discover the amazing world of clouds with your pocket guide to the wonders of the sky and have your spottings verified as you build your own collection of clouds. 

Learn how to spot 58 different cloud formations and optical effects, from the common ones like Cumulus clouds and rainbows to rare ones like the fleeting fluctus cloud or the hard to spot circumzenithal arc. Learn what makes each formation special with expert text from the Cloud Appreciation Society and stunning reference photographs by our app users around the world.

Build up your Collection of spottings and gain CloudSpotter Stars as you do so. Our innovative tools will help you decide what type of clouds or optical effects you’ve spotted. You will hear back from the rest of the community whether they think you got your spotting right. You can see New Spottings by other users around the world and say (with our help) if you think they got theirs right. Becoming an expert cloudspotter has never been easier – or more fun!

And if you’re a subscribing member of the Cloud Appreciation Society you’ll be able to access our Cloud-a-Days each morning. These feature curated photographs by our members, explanations of the clouds featured, inspiring sky quotations, and even examples of clouds depicted in art.

Looking up will never be the same again!

Discover the amazing world of clouds with your pocket guide to the wonders of the sky and have your spottings verified as you build your own collection of clouds. 

Learn how to spot 58 different cloud formations and optical effects, from the common ones like Cumulus clouds and rainbows to rare ones like the fleeting fluctus cloud or the hard to spot circumzenithal arc. Learn what makes each formation special with expert text from the Cloud Appreciation Society and stunning reference photographs by our app users around the world.

Build up your Collection of spottings and gain CloudSpotter Stars as you do so. Our innovative tools will help you decide what type of clouds or optical effects you’ve spotted. You will hear back from the rest of the community whether they think you got your spotting right. You can see New Spottings by other users around the world and say (with our help) if you think they got theirs right. Becoming an expert cloudspotter has never been easier – or more fun!

And if you’re a subscribing member of the Cloud Appreciation Society you’ll be able to access our Cloud-a-Days each morning. These feature curated photographs by our members, explanations of the clouds featured, inspiring sky quotations, and even examples of clouds depicted in art.

Looking up will never be the same again!

Discover the amazing world of clouds with your pocket guide to the wonders of the sky and have your spottings verified as you build your own collection of clouds. 

Learn how to spot 58 different cloud formations and optical effects, from the common ones like Cumulus clouds and rainbows to rare ones like the fleeting fluctus cloud or the hard to spot circumzenithal arc. Learn what makes each formation special with expert text from the Cloud Appreciation Society and stunning reference photographs by our app users around the world.

Build up your own Collection of spottings and use our innovative tools to find out what type of clouds or optical effects you’ve spotted. See New Spottings by other users around the world and say (with our help) if you think they got the clouds right. Our uniquely trained CloudSpotter AI can analyse your image and tell you what cloud types it thinks you’ve spotted. Or you can answer questions about the sky in our Step-by-step Wizard to find the most likely formations. Becoming an expert cloudspotter has never been easier or more fun!

And if you’re a subscribing member of the Cloud Appreciation Society you’ll be able to access our Cloud-a-Days each morning. These feature curated photographs by our members, explanations of the clouds featured, inspiring sky quotations, and even examples of clouds depicted in art.

Looking up will never be the same again!

Discover the amazing world of clouds with your pocket guide to the wonders of the sky and have your spottings verified as you build your own collection of clouds. 

Learn how to spot 58 different cloud formations and optical effects, from the common ones like Cumulus clouds and rainbows to rare ones like the fleeting fluctus cloud or the hard to spot circumzenithal arc. Learn what makes each formation special with expert text from the Cloud Appreciation Society and stunning reference photographs by our app users around the world.

Build up your own Collection of spottings and use our innovative tools to find out what type of clouds or optical effects you’ve spotted. See New Spottings by other users around the world and say (with our help) if you think they got the clouds right. Our uniquely trained CloudSpotter AI can analyse your image and tell you what cloud types it thinks you’ve spotted. Or you can answer questions about the sky in our Step-by-step Wizard to find the most likely formations. Becoming an expert cloudspotter has never been easier or more fun!

And if you’re a subscribing member of the Cloud Appreciation Society you’ll be able to access our Cloud-a-Days each morning. These feature curated photographs by our members, explanations of the clouds featured, inspiring sky quotations, and even examples of clouds depicted in art.

Looking up will never be the same again!

Discover the amazing and unexpected world of clouds with Cloud-a-Day, your pocket guide to the wonders of the sky. 

With stunning photographs and enlightening descriptions, Cloud-a-Day will teach you to identify 40 different cloud formations and 18 optical effects caused by clouds. From the common Cumulus cloud or rainbow to the rare and fleeting fluctus cloud or circumhorizon arc, you will learn what makes each formation special, and how to identify the many beautiful light phenomena of the atmosphere.

Start building up your cloud collection by snapping photos of your own spottings to save them in the app. In a future app update, you will be able to earn stars and achievement and see pictures from other cloudspotters around the globe!

Don’t know what cloud or optical effect you are spotting? Use our Cloud Identifier tools to find out. The amazing CloudSpotter AI will analyse your photo to say what it thinks you’ve photographed. Answering questions about your sky in our Step-by-step Wizard will point you in the direction of the most likely formations. Become an expert cloudspotter has never been easier!

And if you’re a subscribing member of the Cloud Appreciation Society you will be able to log in to access your Cloud-a-Day emails. These feature photographs by Cloud Appreciation Society members of amazing formations around the world, short pieces of cloud science, inspiring sky quotations, and details of the sky in art.

With Cloud-a-Day, looking up will never be the same again!

Discover the amazing and unexpected world of clouds with Cloud-a-Day, your virtual guide to the wonders of the sky. 

With stunning photographs and enlightening descriptions, Cloud-a-Day will teach you to identify 40 different cloud formations and 18 optical effects caused by clouds. From the common Cumulus cloud or rainbow to the rare and fleeting fluctus cloud or circumhorizon arc, you will learn what makes each formation special, and how to identify the many beautiful light phenomena of the atmosphere.

Start building up your cloud collection by snapping photos of your own spottings to save them in the app. In a future app update, you will be able to earn stars and achievement and see pictures from other cloudspotters around the globe!

Don’t know what cloud or optical effect you are spotting? Just answer a few questions about it in the Cloud Identifier tool and we’ll tell you which it is likely to be, or use our new CloudSpotter AI to see which of the ten main cloud types our automatic system thinks you are spotting.

And if you’re a subscribing member of the Cloud Appreciation Society you will be able to log in to access your Cloud-a-Day emails. These feature photographs by Cloud Appreciation Society members of amazing formations around the world, short pieces of cloud science, inspiring sky quotations, and details of the sky in art.

With Cloud-a-Day, looking up will never be the same again!

Discover the amazing and unexpected world of clouds with Cloud-a-Day, your virtual guide to the wonders of the sky. 

With stunning photographs and enlightening descriptions, Cloud-a-Day will teach you to identify 40 different cloud formations and 18 optical effects caused by clouds. From the common Cumulus cloud or rainbow to the rare and fleeting fluctus cloud or circumhorizon arc, you will learn what makes each formation special, and how to identify the many beautiful light phenomena of the atmosphere.

Start building up your cloud collection by snapping photos of your own spottings to save them in the app. In a future app update, you will be able to earn stars and achievement and see pictures from other cloudspotters around the globe!

Don’t know what cloud or optical effect you are spotting? Just answer a few questions about it in the Cloud Identifier tool and we’ll tell you which it is likely to be, or use our new CloudSpotter AI to see which of the ten main cloud types our automatic system thinks you are spotting.

And if you’re a subscribing member of the Cloud Appreciation Society you will be able to log in to access your Cloud-a-Day emails. These feature photographs by Cloud Appreciation Society members of amazing formations around the world, short pieces of cloud science, inspiring sky quotations, and details of the sky in art.

With Cloud-a-Day, looking up will never be the same again!

Discover the amazing and unexpected world of clouds with Cloud-a-Day, your virtual guide to the wonders of the sky. 

With stunning photographs and enlightening descriptions, Cloud-a-Day will teach you to identify 40 different cloud formations and 18 optical effects caused by clouds. From the common Cumulus cloud or rainbow to the rare and fleeting fluctus cloud or circumhorizon arc, you will learn what makes each formation special, and how to identify the many beautiful light phenomena of the atmosphere.

Start building up your cloud collection by snapping photos of your own spottings to save them in the app. In a future app update, you will be able to earn stars and achievement and see pictures from other cloudspotters around the globe!

Don’t know what cloud or optical effect you are spotting? Just answer a few questions about it in the Cloud Identifier tool and we’ll tell you which it is likely to be, or use our new CloudSpotter AI to see which of the ten main cloud types our automatic system thinks you are spotting.

And if you’re a subscribing member of the Cloud Appreciation Society you will be able to log in to access your Cloud-a-Day emails. These feature photographs by Cloud Appreciation Society members of amazing formations around the world, short pieces of cloud science, inspiring sky quotations, and details of the sky in art.

With Cloud-a-Day, looking up will never be the same again!

Discover the amazing and unexpected world of clouds with Cloud-a-Day, your virtual guide to the wonders of the sky. 

With stunning photographs and enlightening descriptions, Cloud-a-Day will teach you to identify 40 different cloud formations and 18 optical effects caused by clouds. From the common Cumulus cloud or rainbow to the rare and fleeting fluctus cloud or circumhorizon arc, you will learn what makes each formation special, and how to identify the many beautiful light phenomena of the atmosphere.

Start building up your cloud collection by snapping photos of your own spottings to save them in the app. In a future app update, you will be able to earn stars and achievement and see pictures from other cloudspotters around the globe!

Don’t know what cloud or optical effect you are spotting? Just answer a few questions about it in the Cloud Identifier tool and we’ll tell you which it is likely to be, or use our new CloudSpotter AI to see which of the ten main cloud types our automatic system thinks you are spotting.

And if you’re a subscribing member of the Cloud Appreciation Society you will be able to log in to access your Cloud-a-Day emails. These feature photographs by Cloud Appreciation Society members of amazing formations around the world, short pieces of cloud science, inspiring sky quotations, and details of the sky in art.

With Cloud-a-Day, looking up will never be the same again!