Google Photos for iOS and Android hit 100 million monthly active users in five months, following its launch in May.

No-cost “unlimited, high quality” storage for photos is one of the core features of the app, which is is likely to be attractive to many people who struggle with limited space on their phones.

“You can safely delete backed-up photos and videos from your device, and still access them using Google Photos. Never run out of space on your phone again,” the company said.

Google Photos also offers to delete similar photos.

The search giant added it has “freed up 3,720 terabytes of storage, that’s like filling up a 16GB phone with photos every day for 637 years.”