Photo Optimization
Photos in Day One are optimized when imported
Current Behavior (Full-Resolution Photos)
Day One stores photos at full resolution. Photos added from your library or files are not resized or compressed. There is no setting to toggle between full-resolution and reduced-resolution — all new photos are stored at full resolution automatically.
Format conversion: JPEG, PNG, and GIF files are stored without modification. Photos in other formats — such as HEIC, the default format on modern iPhones and iPads — are converted to JPEG when added to Day One. The image dimensions are preserved during conversion.
Note: If you’re looking to reduce the amount of storage Day One uses on your device, see Optimize Device Storage. That feature controls whether media is cached locally on your device, but does not affect the resolution of your photos.
In-App Camera
Photos taken with the Day One in-app camera are stored at up to 3200 pixels on the longest side (iOS) or up to 2048 pixels (Android). Photos imported from your photo library are not affected by these limits.
By default, in-app camera photos are not saved to your Photo Library. You can change this in Day One Settings > Advanced > Save a copy to Photo Library (under In-App Camera).
