# SIEVES vs Lock

The clearest difference is update cadence: SIEVES at weekly against Lock's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SIEVES ships an update weekly, Lock every 2 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | SIEVES | Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lock-in-focused-studying/id6756578827/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | — | Free |
| Size | 43 MB | 43 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sidikov Ibrokhim](https://appshunter.io/developer/1754543048) | [Azizbek Zaylobiddinov](https://appshunter.io/developer/1861525386) |

## What reviewers say

### SIEVES

[App page](https://appshunter.io/ios/app/sieves/id6753124737)

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

**In-app purchases:** none


### Lock

[App page](https://appshunter.io/ios/app/lock-in-focused-studying/id6756578827)

This app helps users focus on tasks using timed study sessions, fostering accountability through shared progress and group grinding. It aims to transform screen time into productive output.

**Highlights:** Pomodoro study sessions, Group study grinding, Progress sharing, Accountability features, Screen time to productivity conversion

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

**In-app purchases:** none


## Frequently asked questions

### Is SIEVES free?

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

### Is Lock free?

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

### Do SIEVES or Lock have ads?

Neither SIEVES nor Lock shows ads.

### Which is updated more often, SIEVES or Lock?

SIEVES ships an update weekly, and Lock every 2 weeks. Most recently, SIEVES was updated on October 30, 2026 and Lock on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*