# Puissance J, méthode des Js vs Lockin

The clearest difference is update cadence: Lockin at every 3 days against Puissance J, méthode des Js's every 4 months. Puissance J, méthode des Js's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Puissance J, méthode des Js sells 1 one-off in-app purchase and Lockin sells 4 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Puissance J, méthode des Js ships an update every 4 months, Lockin every 3 days. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Puissance J, méthode des Js | Lockin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Size | 34 MB | 17 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Pierre-Antoine Peron](https://appshunter.io/developer/1434230573) | [Clovis Bonnard](https://appshunter.io/developer/6804245917) |

## What reviewers say

### Puissance J, méthode des Js

[App page](https://appshunter.io/ios/app/puissance-j-methode-des-js/id6698867070)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Accès illimité à vie | $3.99 | one-time |


### Lockin

[App page](https://appshunter.io/ios/app/lockin-maximum-focus/id6809167363)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hebdomadaire | $7.99 | per 7 days |
| Mensuel | $12.99 | per month |
| Annuel | $59.99 | per year |
| Annuel Parrainé | $59.99 | per year |


## Frequently asked questions

### Is Puissance J, méthode des Js free?

Puissance J, méthode des Js is free to download, with in-app purchases available.

### Is Lockin free?

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

### Do Puissance J, méthode des Js or Lockin have ads?

Neither Puissance J, méthode des Js nor Lockin shows ads.

### Which is updated more often, Puissance J, méthode des Js or Lockin?

Puissance J, méthode des Js ships an update every 4 months, and Lockin every 3 days. Most recently, Puissance J, méthode des Js was updated on October 15, 2026 and Lockin on October 24, 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.*