What are some alternatives?
When comparing Boop and Encrypt My Photos, you can also consider the following products
Redacted - Easily blur/pixelate/black out parts of an image
Cryptee - Cryptee is a zero-knowledge, encrypted photos, documents, files, notes and journaling platform. A unified place to safekeep your data without worrying about losing your privacy.
Blur - Blur is a software application available for both Google Chrome and your smartphone. It's developed by Abine, an online privacy company trusted by more than twenty million people. Read more about Blur.
Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.
BURN.link - Send secure, encrypted, self-destructing messages
hat.sh - Free, fast, secure and serverless file encryption