# Mastermind vs Lock In

Mastermind and Lock In both sit at 4.6 stars, but that hides the real split: 64% of Mastermind's written reviews are positive against 20% of Lock In's. Mastermind also leads on iOS requirement (15.1 vs 18.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Mastermind sells 9 in-app purchases, starting at $9.99 per 7 days and Lock In sells 3 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for Mastermind against 4.5 for Lock In. Both are backed by a comparable volume of ratings — 53 and 73 respectively. Written reviews are what separate them: 64% of Mastermind's written reviews are positive against 20% of Lock In's.

Mastermind ships an update monthly, Lock In every 3 weeks. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Mastermind | Lock In |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (53 ratings)](https://appshunter.io/ios/app/mastermind-self-improvement/id6745372849/reviews)** | [4.5 (73 ratings)](https://appshunter.io/ios/app/lock-in-75-hard-challenge/id6755106971/reviews) |
| Number of ratings | 53 | **73** |
| Positive reviews | **63.6% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 75 MB | 71 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MYKS Labs Inc.](https://appshunter.io/developer/1803280982) | [Starlight Ltd.](https://appshunter.io/developer/1723007718) |

## What reviewers say

### Mastermind

[App page](https://appshunter.io/ios/app/mastermind-self-improvement/id6745372849)

This app provides a personalized habit-building system based on behavioral psychology. It assesses your needs, creates a scalable habit sequence, and offers daily coaching and progress tracking to foster lasting life changes.

**Highlights:** Personalized habit assessment, Progressive habit scaling, Daily coaching and insights, Real-time progress tracking, Gamified progress system, Evidence-based habit library

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mastermind: Self Improvement | $9.99 | per 7 days |
| Mastermind: Self Improvement | $14.99 | per month |
| Mastermind: Self Improvement | $19.99 | per month |
| Mastermind: Self Improvement | $29.99 | per year |
| Mastermind: Self Improvement | $34.99 | per 3 months |
| Mastermind: Self Improvement | $39.99 | per year |
| Mastermind: Self Improvement | $39.99 | per year |
| Mastermind: Self Improvement | $49.99 | per year |
| Mastermind: Self Improvement | $59.99 | per year |


### Lock In

[App page](https://appshunter.io/ios/app/lock-in-75-hard-challenge/id6755106971)

This app gamifies self-improvement by turning habit building into a 66-day quest. It offers challenges, streak protection, and XP-based progress to help users level up in real life. Focus on building good habits and breaking bad ones with quick feedback and visible wins.

**Highlights:** 66-day habit lock-in cycles, Gamified streaks, XP, and rewards, Quest-based habit setup, Bad habit cooldown tracking, Progress dashboards, Daily check-ins with streak protection

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get Monthly Premium! | $17.99 | per month |
| Get Yearly Premium! | $19.99 | per year |
| Get Yearly Premium! | $29.99 | per year |


## Frequently asked questions

### Is Mastermind free?

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

### Is Lock In free?

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

### Which has better reviews, Mastermind or Lock In?

Mastermind is rated higher. Mastermind averages 4.6 out of 5 from 53 ratings, while Lock In averages 4.5 from 73 ratings.

### Do Mastermind or Lock In have ads?

Neither Mastermind nor Lock In shows ads.

### Which is updated more often, Mastermind or Lock In?

Mastermind ships an update monthly, and Lock In every 3 weeks. Most recently, Mastermind was updated on October 23, 2026 and Lock In on October 30, 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.*