# Lock Notes vs Decision Logic

The clearest difference is monetization model: Decision Logic at free with in-app purchases against Lock Notes's subscription. Decision Logic also leads on review sentiment (80% vs 57%). Lock Notes's advantage is ads (none vs shown) and rating (4.4 vs 4.1). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Lock Notes sells 7 in-app purchases, starting at $4.99 per 7 days and Decision Logic sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Lock Notes holds the better App Store score, 4.4 against 4.1. That said, the two scores are not equally well evidenced: Lock Notes has 137 ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 57% of Lock Notes's written reviews are positive against 80% of Decision Logic's, so the app with the better star average is not the one people write more warmly about.

Lock Notes ships an update every 10 days, Decision Logic every 3 weeks. The most recent releases landed on September 22, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | Lock Notes | Decision Logic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (137 ratings)](https://appshunter.io/ios/app/lock-notes-private-journal/id1211884686/reviews)** | [4.1 (12 ratings)](https://appshunter.io/ios/app/decision-logic-michi/id6748796286/reviews) |
| Number of ratings | **137** | 12 |
| Positive reviews | 56.5% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 15 MB | 75 MB |
| Requires iOS | 15.0 | **14.0.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LYKOV STUDIO LTD](https://appshunter.io/developer/1783754094) | [Southeast Adventures LLC](https://appshunter.io/developer/1827386898) |

## What reviewers say

### Lock Notes

[App page](https://appshunter.io/ios/app/lock-notes-private-journal/id1211884686)

Securely store private thoughts, passwords, and reminders with biometric authentication. Enjoy a simple, elegant interface with iCloud sync, customizable themes, and backup options. Your data remains private and encrypted.

**Highlights:** Biometric authentication (Face ID, Touch ID), Encrypted note storage, iCloud sync across devices, Customizable themes and dark mode, Backup and restore functionality, Ad-free minimalist interface

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Monthly | $7.99 | per month |
| Annual | $29.99 | per year |
| Annual | $29.99 | per year |
| Disable ads | $0.99 | one-time |
| Lifetime | $39.99 | one-time |


### Decision Logic

[App page](https://appshunter.io/ios/app/decision-logic-michi/id6748796286)

This app helps you make better decisions by comparing multiple options based on your priorities. It guides you through a structured process to evaluate choices, avoid regret, and feel confident in your selections.

**Highlights:** Step-by-step decision guidance, Compare multiple options, Define and rate decision factors, Visual breakdown of pros and cons, Save and revisit past decisions, Avoid impulse choices

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Plan | $1.99 | per 7 days |
| Lifetime Pro Access | $1.99 | one-time |


## Frequently asked questions

### Is Lock Notes free?

Lock Notes is free to download, with in-app purchases available.

### Is Decision Logic free?

Decision Logic is free to download, with in-app purchases available.

### Which has better reviews, Lock Notes or Decision Logic?

Lock Notes is rated higher. Lock Notes averages 4.4 out of 5 from 137 ratings, while Decision Logic averages 4.1 from 12 ratings.

### Do Lock Notes or Decision Logic have ads?

Decision Logic shows ads; Lock Notes does not.

### Which is updated more often, Lock Notes or Decision Logic?

Lock Notes ships an update every 10 days, and Decision Logic every 3 weeks. Most recently, Lock Notes was updated on September 22, 2026 and Decision Logic on July 4, 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.*