Use "Diary with lock" app to make your own personal journal of daily events, appointments, secrets and feelings.

• Diary with lock: Password & pin code protection
• Diary with lock: Personalize background color (Pink, Purple, Blue, ++)
• Diary with lock: Change font-style
• Diary with lock: Easy to use
• Diary with lock: Search entries
• Diary with lock: Make unlimited entries
• Diary with lock: Support 3 languages: English, Japanese, Vietnamese.
• Diary with lock: The most downloaded diary app on AppStore!

Build from the ground up to be simple and user friendly, the user interface is designed to allow you to enter new notes quickly and easily. With this Diary you can write all your private notes and secure them with a pin code or password.

* Track and write about your daily activities
Make it a habit to quickly write one or more mini-notes during your day. Simply leave a few words about your workout session, what happened at school or in the office during your day. In weekends, you can write about all the fun you had walking your dog, meeting with friends, or being social with your family. Make it a unique travel diary, or road journal that documents your journey. This can be the daily activity log you always have wanted. Make it your personal journal and have fun reading it over in few year, and share a few laughs with your friends. As this app is pure textual, and contains no images or photos, it runs ultra fast and smooth on any iOS device, and consumes minimal of available memory and disk-space!

* This diary is perfect to use as:

1. Diet journal
A food diary is a daily record of all food consumed as a means of tracking calorie consumption, weight loss or other nutritional monitoring.

2. Dream journal
Or dream diary is a journal in which dream experiences are recorded for later analysis and possibly oneiromancy.

3. Sleep diaries
A sleep log is a tool used in diagnosis of sleep disorders.

4. Travel journals
A travel diary, or road journal, is valuable documentation of a journey. (only textual, no images or photos)

5. Write your own Autobiography
This diary app can easily fit the purpose of a writing down your memoir or chronicle. Keep a log or logbook to record history. Do like famous Anne Frank, make daily records, document life in your own daybook.

Never forget a journal entry again, setup a reminder to alert you when it is time to write. Protect all personal notes by adding a pin code when it starts up. Never worry about losing memories again. Easily send a backup of diary entries directly to email for extra protection.

What’s New

Version 2.0

New version 2.0:
- Fix bug keyboard overlaying writing area.
- Fix bug Password screen able to dismissed.

Ratings and Reviews

4.4 out of 5
1K Ratings

1K Ratings

HBO now user ,

Diary app

I truly enjoy this app being able to customize certain things. It’s great and it works well with my iPhone X max. The only down side to this app is the constant ads just to be able to write in the journal it’s becoming tedious and annoying. I had to close out at least 5 ads before being able to write in the journal if the developers can bring it down to 2 ads or none that would be great. Otherwise the app it’s self is great.

Developer Response ,

Thank you for us­ing app.
Please up­date to ver­sion 1.4 and use in-app pur­chase to re­move ads.

Maya 205 ,

Love the app just one thing...

This app is amazing don’t get me wrong. It allows you to create a passcode so no one else can see your entries, it allows you to change color and fonts, and it’s very organized because it saved your entries by dates so you can see when you typed it! Only one problem... If I’m listening to music and I try to open the app it doesn’t always work it will just stop the music. So if this app can somehow fix that it will be amazing! But again I still gave it five stars because that’s the only problem. I’ve had this app for about a month now and I haven’t seen any other problems yet. I feel so much better after I get these things off my chest and I really recommend this app if you are someone like me who usually has something they have to get off there chest. Believe me you will feel so much better after typing a diary entry!

Developer Response ,

thank you so much, please invite your friend to use app.

mia roberta lupeta dulce ,


I like this cause I can keep all my secrets and nothing will ever happen because a normal find out my password and it will be good because whoever use this app ever uses this app is going to be so happy because you can change your password if you remember your old one or you can restart everything but even though you restart everything on all your taxes for your diary won’t like a race that’s what I like and I can write more and more every day and I tell everyone I want no one will ever know my password for that soon I’ll be so happy so don’t forget thank you for reading my report bye

Developer Response ,


App Privacy

The developer, Tuyen Bui, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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