# Calclin vs Lock In

The clearest difference is rating: Lock In at 5.0 against Calclin's 2.0. Lock In also leads on update cadence (every 3 days vs monthly). Calclin's advantage is monetization model (free vs subscription). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Calclin sells 2 one-off in-app purchases and Lock In sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Lock In holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

Calclin ships an update monthly, Lock In every 3 days. The most recent releases landed on July 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Calclin | Lock In |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/calclin/id385216637/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lock-in-stop-procrastinating/id6743096520/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | **Free** | Subscription |
| Size | 8 MB | 127 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Azukid.com](https://appshunter.io/developer/354937951) | [Georg Ye](https://appshunter.io/developer/1801307743) |

## What reviewers say

### Calclin

[App page](https://appshunter.io/ios/app/calclin/id385216637)

This calculator app provides a paper-roll style history for easy review of calculations. It supports formula input, notes for results, and multiple calculation frames to organize different tasks. Users can customize display modes and appearance.

**Highlights:** Paper-roll style calculation history, Multiple calculation frames, Formula input with parentheses and functions, Notes for calculation results, PDF export, Customizable digit grouping, separators, and rounding, Auto, Light, and Dark appearance modes

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tips_1 | $0.99 | one-time |
| Tips_5 | $4.99 | one-time |


### Lock In

[App page](https://appshunter.io/ios/app/lock-in-stop-procrastinating/id6743096520)

This app helps you break phone addiction by disabling selected apps during focused sessions. You can set durations, create schedules, and take scheduled breaks. Friends can help you end sessions early, and emergency unlocks are available.

**Highlights:** Disable selected apps for set durations, Create weekly app usage schedules, Scheduled breaks with daily limits, Friend-assisted session unlocking, Emergency unlock option, App uninstall protection, Set daily app usage limits

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solo Membership (Monthly) | $2.99 | per month |
| Solo Membership (Annually) | $19.99 | per year |
| Friends Membership (Annually) | $24.99 | per year |
| Emergency Unlock | $4.99 | one-time |


## Frequently asked questions

### Is Calclin free?

Calclin 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, Calclin or Lock In?

Lock In is rated higher. Calclin averages 2.0 out of 5 from 1 ratings, while Lock In averages 5.0 from 1 ratings.

### Do Calclin or Lock In have ads?

Neither Calclin nor Lock In shows ads.

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

Calclin ships an update monthly, and Lock In every 3 days. Most recently, Calclin was updated on July 18, 2026 and Lock In on September 9, 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.*