Comparison

My Diary With Lock vs Mellow Mood Tracker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

My Diary With Lock

This app provides a secure and private space to record daily thoughts, moods, and memories. It offers password protection, mood tracking with emotion icons, and a calendar view to revisit past entries. Customize your journal with various artistic styles.

Highlights
  • Password and Face ID protection
  • Mood tracking with emotion icons
  • Quick notes with photos and emojis
  • Calendar view for browsing entries
  • Customizable fonts, backgrounds, and covers
Features
Read full description

The cute diary app specially designed for you, with mood tracking and password protection features. Whether it’s daily moods, memorable moments, or deep reflections, everything is safely stored here. Private & Secure Your diary is protected with a password lock and Face ID. Everything you write stays private and visible only to you. Mood Diary Record your moods using adorable emotion icons inspired by Plutchik’s Wheel of Emotions, allowing you to record moods in a soothing and easy way. Quick Notes Capture your feelings anytime with photos, text, and emojis. Calendar View Browse your diary by day or month and easily revisit memories from any specific date. Personalized Journal Customize artistic fonts, font size, background letter styles, and diary covers to create your own exclusive journal. If you have suggestions or feedback, please contact us in the app!

About

Mellow Mood Tracker

Features
Read full description

A quiet place to notice how you feel, one day at a time. Move the slider once a day. Add a word or two if you want. Ten seconds, honestly — and the day is saved. WHAT IS IN IT • One check-in a day: how you feel, what filled the day, last night's sleep, your energy, and a line of your own if you feel like writing one. • A calendar that fills in with colour, so a month is something you can take in at a glance. • Patterns: your average, the last fourteen days, and what tends to lift you. • A journal of the days you have saved. • Small habits, ticked off when you do them. WORTH NOTICING Once there is enough to say anything about, the app offers at most two quiet observations a week. How days after short nights compared with days after longer ones. Which tag your better days tend to carry. These are observations, never explanations. "After nights under six hours your days averaged low" is something your own calendar says. "Poor sleep is hurting your mood" is a claim about your life that a handful of days cannot support, and this app will not make it. Every observation tells you how many days it rests on, and says plainly when that number is small. YOUR ENTRIES STAY YOURS There is no account. There is no server. Nothing is uploaded and nothing is shared. The app contains no networking code at all, so your entries cannot leave this phone: not by a decision of ours, and not by a mistake of ours either. No ads. No purchases. No analytics. No tracking. Erasing everything takes two taps in Settings, and it happens immediately. DETAILS • Light and dark themes, following the system or set by hand. • Speaks thirty languages — from English, Ukrainian and Spanish to Korean, Vietnamese, Hebrew and Tamil — and lays itself out right-to-left in Arabic, Hebrew, Persian and Urdu. • Works entirely offline, because it has no other option.

Screenshots

My Diary With Lock4 screens
Mellow Mood Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: Mellow Mood Tracker at none against My Diary With Lock's 3. Mellow Mood Tracker also leads on update cadence (every 11 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. My Diary With Lock sells 3 in-app purchases, starting at $1.99 per month. Mellow Mood Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

My Diary With Lock ships an update every 3 months, Mellow Mood Tracker every 11 days. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level
My Diary With Lock versus Mellow Mood Tracker: the parameters behind the verdict, then further details
ParameterMy Diary With LockMellow Mood Tracker
PriceFreeFree
Rating4.7 (1.8K ratings) — better—
Positive reviews91.1% of reviews—
Number of ratings1.8K — better—
Update frequencyEvery 3 monthsEvery 11 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size33 MB20 MB
Age rating4+4+
DeveloperMEETFIRE LIMITEDAndrii Kuliahin

Bugs and requests

My Diary With Lock

Reported bugs

2 issues
  • Submitted diary entries sometimes reset font settings
  • Occasional data loss when switching devices

Requested features

4 requests
  • Add more journal cover options
  • Implement backup and restore functionality
  • Improve font customization options
  • Introduce a dark mode theme

Mellow Mood Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

My Diary With Lock

Subscriptions2
  • Monthly VIP$1.991 Month
  • Yearly VIP$7.991 Year
One-time1
  • Lifetime VIP$9.99
None

Mellow Mood Tracker

No in-app purchases

Questions

Is My Diary With Lock free?
My Diary With Lock is free to download, with in-app purchases available.
Is Mellow Mood Tracker free?
Mellow Mood Tracker is free to download, with no in-app purchases.
Do My Diary With Lock or Mellow Mood Tracker have ads?
Neither My Diary With Lock nor Mellow Mood Tracker shows ads.
Which is updated more often, My Diary With Lock or Mellow Mood Tracker?
My Diary With Lock ships an update every 3 months, and Mellow Mood Tracker every 11 days. Most recently, My Diary With Lock was updated on October 18, 2026 and Mellow Mood Tracker on October 10, 2026.

Other comparisons