# LOCK MEMO vs Simple Diary, Journal, Notes

The clearest difference is in-app purchases: Simple Diary, Journal, Notes at none against LOCK MEMO's 1. Simple Diary, Journal, Notes also leads on review sentiment (86% vs 74%) and iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. LOCK MEMO sells 1 in-app purchase, starting at $0.99 per month. Simple Diary, Journal, Notes asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for LOCK MEMO against 4.8 for Simple Diary, Journal, Notes. Both are backed by a comparable volume of ratings — 494 and 172 respectively. Written reviews are what separate them: 74% of LOCK MEMO's written reviews are positive against 86% of Simple Diary, Journal, Notes's.

LOCK MEMO ships an update monthly, Simple Diary, Journal, Notes fortnightly. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | LOCK MEMO | Simple Diary, Journal, Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (494 ratings)](https://appshunter.io/ios/app/lock-memo-secure-notes/id1070901429/reviews) | **[4.8 (172 ratings)](https://appshunter.io/ios/app/simple-diary-journal-notes/id1564645368/reviews)** |
| Number of ratings | **494** | 172 |
| Positive reviews | 74.5% of reviews | **86.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 31 MB | 45 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [EasterEggs](https://appshunter.io/developer/553389214) | [Futoshi Niiho](https://appshunter.io/developer/1545504639) |

## What reviewers say

### LOCK MEMO

[App page](https://appshunter.io/ios/app/lock-memo-secure-notes/id1070901429)

This app offers a straightforward way to create and manage private notes with robust passcode protection. It's designed for intuitive use, requiring no complex setup to keep your personal information, ideas, and daily entries secure and organized.

**Highlights:** Passcode protection, Create and edit notes, Folder management, Search notes, iCloud backup, Adjustable font size

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $0.99 | per month |

**What reviewers like**

- 👍 Very easy to use and intuitive
- 🔒 Password protection and security features
- 💾 Reliable for storing notes and important information
- ⚡ Simple and lightweight application
- 📝 Great for quick memos and memory jogger

**What reviewers complain about**

- 🐛 Notes disappearing unexpectedly
- 🐛 Edit function stops working after extended use
- 📱 Compatibility issues with newer iOS versions
- ❌ No alphabetical sorting capability
- ❌ No search functionality

**Reported bugs**

- Notes disappearing from folders
- Edit function becomes unavailable
- App incompatible with newer iOS versions
- Touch ID not functioning despite advertised
- Password recovery issues

**Requested features**

- Alphabetical sorting of notes
- Search functionality
- Touch ID/biometric authentication
- Text formatting options (bold, underline, italics)
- Ability to share or export notes


### Simple Diary, Journal, Notes

[App page](https://appshunter.io/ios/app/simple-diary-journal-notes/id1564645368)

This app offers a straightforward and aesthetically pleasing way to maintain a daily journal. Designed for users seeking simplicity, it avoids complex settings for an intuitive and stress-free journaling experience.

**Highlights:** Simple daily diary keeping, Easy-to-use interface, Beautiful and clean design, Intuitive management, Stress-free journaling

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and efficient
- 📝 Convenient for quick note-taking
- 🗓️ Automatic date tracking
- 📷 Ability to attach photos
- 🔒 Password protection

**What reviewers complain about**

- 🔤 Unable to adjust font size
- 🐛 Occasional data loss or disappearing entries
- 🖼️ Photo attachment process can be cumbersome

**Reported bugs**

- Entries disappearing without explanation
- Crashes or freezes after recent update
- Issues with photo attachment and display

**Requested features**

- Allow editing of existing entries
- Display time of each entry
- Ability to change font style
- Option to print or export diary entries
- Calendar view with ability to navigate between months


## Frequently asked questions

### Is LOCK MEMO free?

LOCK MEMO is free to download, with in-app purchases available.

### Is Simple Diary, Journal, Notes free?

Simple Diary, Journal, Notes is free to download, with no in-app purchases.

### Which has better reviews, LOCK MEMO or Simple Diary, Journal, Notes?

Simple Diary, Journal, Notes is rated higher. LOCK MEMO averages 4.7 out of 5 from 494 ratings, while Simple Diary, Journal, Notes averages 4.8 from 172 ratings.

### Do LOCK MEMO or Simple Diary, Journal, Notes have ads?

Both LOCK MEMO and Simple Diary, Journal, Notes show ads.

### Which is updated more often, LOCK MEMO or Simple Diary, Journal, Notes?

LOCK MEMO ships an update monthly, and Simple Diary, Journal, Notes fortnightly. Most recently, LOCK MEMO was updated on September 22, 2026 and Simple Diary, Journal, Notes on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*