# Lock Screen Calendar vs Must

The clearest difference is rating: Lock Screen Calendar at 5.0 against Must's 4.0. Lock Screen Calendar also leads on update cadence (every 3 days vs every 2 months) and ratings volume (18 vs 1). Must's advantage is in-app purchases (none vs 6) and iOS requirement (12.0 vs 18.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Lock Screen Calendar sells 6 in-app purchases, starting at $1.99 per month. Must asks for nothing beyond the download.

Lock Screen Calendar holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Lock Screen Calendar has 18 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 88% of Lock Screen Calendar's written reviews are positive against 90% of Must's, so the app with the better star average is not the one people write more warmly about.

Lock Screen Calendar ships an update every 3 days, Must every 2 months. The most recent releases landed on September 29, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | Lock Screen Calendar | Must |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (18 ratings)](https://appshunter.io/ios/app/lock-screen-calendar-coretask/id6478839577/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/must/id6479213927/reviews) |
| Number of ratings | **18** | 1 |
| Positive reviews | 88.0% of reviews | **90.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 42 MB | 52 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gridus Co.](https://appshunter.io/developer/1636121761) | [Jichan Hwang](https://appshunter.io/developer/1735193590) |

## What reviewers say

### Lock Screen Calendar

[App page](https://appshunter.io/ios/app/lock-screen-calendar-coretask/id6478839577)

This app helps you manage your time and overcome procrastination by organizing tasks based on importance and urgency. It offers a focus timer to help you complete tasks efficiently and reduce stress.

**Highlights:** Priority setting by importance and urgency, Step-by-step task organization, Time allocation for tasks, Focus timer for task completion, Stress reduction and productivity boost

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Monthly Plan | $4.49 | per month |
| Weekly Plan | $4.49 | per 7 days |
| Annual Plan | $29.99 | per year |
| Lifetime Plan | $29.99 | one-time |
| Lifetime Access | $39.99 | one-time |


### Must

[App page](https://appshunter.io/ios/app/must/id6479213927)

Manage all your schedules quickly and easily with this intuitive app. It offers convenient schedule notifications, a dark theme option, and a task monitor to keep track of your to-dos. Organize your tasks systematically using the Eisenhower Matrix and color-coded tags.

**Highlights:** Eisenhower Matrix for systematic task management, Convenient schedule notifications, Home screen widgets for quick access, Customizable color tags for event classification, Task monitor with filtering options, Dark theme support

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

**In-app purchases:** none


## Frequently asked questions

### Is Lock Screen Calendar free?

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

### Is Must free?

Must is free to download, with no in-app purchases.

### Which has better reviews, Lock Screen Calendar or Must?

Lock Screen Calendar is rated higher. Lock Screen Calendar averages 5.0 out of 5 from 18 ratings, while Must averages 4.0 from 1 ratings.

### Do Lock Screen Calendar or Must have ads?

Neither Lock Screen Calendar nor Must shows ads.

### Which is updated more often, Lock Screen Calendar or Must?

Lock Screen Calendar ships an update every 3 days, and Must every 2 months. Most recently, Lock Screen Calendar was updated on September 29, 2026 and Must on August 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.*