The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Austin Burrow:
TextLatch securely stores notes entered by the user preventing unauthorized viewing by third parties.Features- Note and folder encryption. Every note and folder are encrypted. Notes and folders are decrypted when the required password has been provided by the user. This keeps out unwanted access to secure notes.- Recent notes. The recent notes tab shows a list of notes that the user has recently edited, preventing the need to traverse through folders again.- Password change. The user is able to change their password in the settings tab. The old password is required.Technical detailsTextLatch encrypts notes and folders using AES 256-bit encryption. The user-provided password is used as a key to both encrypt and decrypt information on app load and app close.