Momento ($2.99 → Free, 11.9 MB): Record interesting and special moments throughout your day with this lifestyle app. When crafting a new entry you’re able to rate it, attach photos, collect and use activity from your social networking streams, and tag events, people, and places. You’re also able to create custom tags to help you hunt down your favorite moments. You’re able to view all of your entries in list form, calendar form, or search for something specific. The app also includes the ability to backup your data, protect your entries with a passcode, and change the font size.
Momento is available for free for a limited time. It has a 4.5-star rating with a total of 116 ratings.
I am using it and I have to say its a good way to keep your journal.
There are better out there thought, DayOne for starters. The problem with this app is that its basically become abandonware. While other apps have expanded and included more functionality, this one hasn't been seriously updated in like 2 years.
Other apps like Day One also have dropbox integration, and multi platform editors.
Still, can't beat free.