tinythoughts is described as 'one sentence a day journal. Every day, write 240 characters about your life. tinythoughts is encrypted - so only you can read your entries. Answer a new prompt every day! Tag your entries so you can filter by common themes'. There are more than 50 alternatives to tinythoughts for a variety of platforms, including iPhone, Android, iPad, Online / Web-based and Android Tablet. The best alternative is Zoho Notebook. It's not free, so if you're looking for a free alternative, you could try Daylio or Day One. Other great apps like tinythoughts are Journey (Paid), glimpses (Paid), Exist (Paid) and Lifeograph (Free, Open Source).
Start writing your thoughts and memories and have them synced and backed up in the cloud. glimpses use Dropbox syncing capabilities to sync all your entries. It stores your data at Dropbox service. Just authorize with Dropbox and you're ready to go.
Diaro is designed to record your activities, daily events, appointments, experiences, thoughts, secrets and ideas throughout the day and sync data across all your devices. It is the easiest and most secure way to keep a diary.
Privately track, monitor and analyze your mood and anything else in your life. It's like MyFitnessPal for your emotions. Track anything that's important to you. Design your own trackers, tap the button to record. Analyze your Life
Momento is a unique diary/journal writing app for iPhone & iPod touch, which provides a quick and easy way to record moments throughout your day. Connect with popular social web services, such as Twitter, Facebook, Flickr and Last.