Once Upon

Con

1. Limited Customization Options: Once Upon's design philosophy favors simplicity, which can result in limited customization options for users who wish to have more control over the layout, fonts, and overall design of their photo book, potentially not satisfying users with specific creative desires.

2. Platform Availability: Once Upon may not be available across all operating systems or devices, which could alienate users who are not using supported platforms. This limitation can be inconvenient for those who prefer to work on a desktop or whose devices are incompatible.

3. Subscription Model: For users who prefer a one-time purchase, Once Upon's subscription-based model might be a disadvantage. Ongoing payments can add up over time, making it potentially more costly than other services that offer a pay-per-product option without recurring fees.