# LOCK MEMO vs Just a Calculator

The clearest difference is update cadence: Just a Calculator at every 4 days against LOCK MEMO's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. LOCK MEMO sells 1 in-app purchase, starting at $0.99 per month and Just a Calculator sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

LOCK MEMO ships an update monthly, Just a Calculator every 4 days. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | LOCK MEMO | Just a Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (496 ratings)](https://appshunter.io/ios/app/lock-memo-secure-notes/id1070901429/reviews)** | — |
| Number of ratings | **496** | — |
| Positive reviews | 74.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 10 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [EasterEggs](https://appshunter.io/developer/553389214) | [Yuichi Ono](https://appshunter.io/developer/1871280285) |

## 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


### Just a Calculator

[App page](https://appshunter.io/ios/app/just-a-calculator-that-works/id6811397340)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Event Plus | $0.99 | per month |
| Ad-Free | $0.99 | one-time |


## Frequently asked questions

### Is LOCK MEMO free?

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

### Is Just a Calculator free?

Just a Calculator is free to download, with in-app purchases available.

### Do LOCK MEMO or Just a Calculator have ads?

Both LOCK MEMO and Just a Calculator show ads.

### Which is updated more often, LOCK MEMO or Just a Calculator?

LOCK MEMO ships an update monthly, and Just a Calculator every 4 days. Most recently, LOCK MEMO was updated on October 29, 2026 and Just a Calculator on October 26, 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.*