# ButterDocs vs App Lock

The clearest difference is rating: ButterDocs at 4.0 against App Lock's 1.0. ButterDocs also leads on in-app purchases (none vs 3) and device support. On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. App Lock sells 3 in-app purchases, starting at $4.99 per 7 days. ButterDocs asks for nothing beyond the download.

ButterDocs holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

ButterDocs ships an update every 3 months, App Lock every 4 months. The most recent releases landed on September 27, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | ButterDocs | App Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/butterdocs/id6448757725/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/app-lock-secure-vault/id6756806108/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 64 MB | 38 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Arc Studio Labs, Inc.](https://appshunter.io/developer/1656256390) | [Hardik Dhameliya](https://appshunter.io/developer/1611140120) |

## What reviewers say

### ButterDocs

[App page](https://appshunter.io/ios/app/butterdocs/id6448757725)

This word processor helps you develop ideas, structure your work, and write without distraction. Collaborate seamlessly with others, with or without AI assistance, for ambitious writing projects.

**Highlights:** Idea development, Work structuring, Distraction-free writing, Frictionless collaboration, AI assistance option

**In-app purchases:** none


### App Lock

[App page](https://appshunter.io/ios/app/app-lock-secure-vault/id6756806108)

Secure your iPhone with this comprehensive privacy app. It offers app locking, a private photo and video vault, file storage, secure notes, and a private browser to keep your data safe and under your control.

**Highlights:** App lock and unlock, Private photo and video vault, Secure file storage, Password-protected notes, Private secure browser, Unified secure vault

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription Weekly | $4.99 | per 7 days |
| Subscription Monthly | $9.99 | per month |
| Subscription Yearly | $19.99 | per year |


## Frequently asked questions

### Is ButterDocs free?

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

### Is App Lock free?

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

### Which has better reviews, ButterDocs or App Lock?

ButterDocs is rated higher. ButterDocs averages 4.0 out of 5 from 3 ratings, while App Lock averages 1.0 from 1 ratings.

### Which is updated more often, ButterDocs or App Lock?

ButterDocs ships an update every 3 months, and App Lock every 4 months. Most recently, ButterDocs was updated on September 27, 2026 and App Lock on October 1, 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.*