# Vocab Builder vs Lock Learn

The clearest difference is update cadence: Lock Learn at every 2 days against Vocab Builder's every 11 months. Vocab Builder's advantage is iOS requirement (16.2 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Vocab Builder sells 1 in-app purchase, starting at $3.99 per 7 days and Lock Learn sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Vocab Builder ships an update every 11 months, Lock Learn every 2 days. The most recent releases landed on September 17, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | Vocab Builder | Lock Learn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/lock-learn-passive-learning/id6778682190/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 3 MB |
| Requires iOS | **16.2** | 18.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kamil Demirtas](https://appshunter.io/developer/1328561522) | [MaxQ Consulting Services LLC](https://appshunter.io/developer/1814475176) |

## What reviewers say

### Vocab Builder

[App page](https://appshunter.io/ios/app/vocab-builder-live-words/id6560115054)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vocab Pro Weekly | $3.99 | per 7 days |


### Lock Learn

[App page](https://appshunter.io/ios/app/lock-learn-passive-learning/id6778682190)

Learn new vocabulary effortlessly by having words and definitions appear on your phone's lock screen every 10 minutes. Create custom word lists for any subject, from languages to professional terms, and tap to explore them further. Start with 20 free words and unlock unlimited access with a one-time purchase.

**Highlights:** Lock screen vocabulary widget, Customizable word lists by topic, Definitions and grammar labels, Tap to view word details, One-time purchase for unlimited words

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LockLearn | $1.99 | one-time |


## Frequently asked questions

### Is Vocab Builder free?

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

### Is Lock Learn free?

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

### Do Vocab Builder or Lock Learn have ads?

Neither Vocab Builder nor Lock Learn shows ads.

### Which is updated more often, Vocab Builder or Lock Learn?

Vocab Builder ships an update every 11 months, and Lock Learn every 2 days. Most recently, Vocab Builder was updated on September 17, 2026 and Lock Learn on July 23, 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.*