This is "Time Messages - viewer", with only viewer function, totally free!
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Time Messages: create time capsules and send messages in the future!
Create a message, add a title and attach text, photos, audio, and even links to web pages. You can add as many attachments you want. Then, set an opening date: you have created a time capsule! You can keep it saved or send it to whoever you want.
Before date no one can open the message, neither you, nor anyone else. It will only see the title. On the main screen you will have the list of messages, the opening date and a countdown in minutes. The messages (both closed and open) can be sent by text message, by email, or saved on the PC using, for example, Dropbox or Google Drive.
The date is synchronized with an online server, and is therefore independent of the device. For this reason, the app requires an internet connection. The data consumption is still negligible!