Vocab Builder vs Lock Learn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vocab Builder
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Vocab turns the time you spend staring at your Lock Screen into language learning. New words appear on the Lock Screen and Dynamic Island throughout the day — no app to open, no flashcards to shuffle, no streaks to chase. WHY VOCAB • Learn passively. Every glance at your phone is a chance to remember a new word in context. • Live Activity that sticks. Pin a word and example sentence to the Lock Screen until it's locked in. • Dynamic Island companion on iPhone 14 Pro and later — the target word stays one swipe away. • Choose your pace. Rotate words every 30 seconds to every 10 minutes — your call. LEARN 6 LANGUAGES English, Turkish, French, German, Spanish, and Japanese. Pick your native tongue and the language you're learning, and Vocab handles the rest. 4 LEVELS • Beginner — everyday words that get you started fast • Intermediate — vocabulary that powers real conversations • Advanced — nuanced words for fluency • Proficient — the words that separate good from great BUILT FOR REAL ATTENTION SPANS You don't need an hour a day. You don't need to remember to study. Vocab works in the background while you scroll, message, or wait for the bus. The words just show up. TRACK YOUR LEARNED WORDS Every word the Live Activity shows is saved to your Learned Words list, sorted by language. Open the app, see your progress, and pick up where you left off. PRIVACY-FIRST Words stay on your device. No accounts, no tracking, no shared lists. Your learning is yours. PREMIUM Unlock Intermediate, Advanced, and Proficient levels with a 3-day free trial, then it auto-renews monthly. Cancel anytime in your App Store subscription settings. — Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ — Privacy Policy: https://www.privacypolicies.com/live/3df3708c-7fb6-4955-a940-b7fd2440aaca
Lock Learn
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.
- Lock screen vocabulary widget
- Customizable word lists by topic
- Definitions and grammar labels
- Tap to view word details
- One-time purchase for unlimited words
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Lock Learn puts a vocabulary word on your lock screen and swaps it out every 10 minutes, all day. You're checking your phone constantly anyway, so you might as well pick something up in the meantime. There are no study sessions, no streaks to maintain, and no extra time required. How it works: Add the Lock Learn widget to your lock screen. From that point on, every time you glance at your phone you'll see a different word from your list along with its definition and grammar type. The widget refreshes in the background every 10 minutes without you doing anything. Build your own word lists: Lock Learn isn't tied to a preset word bank. You create topics for whatever you're working on: a language you're studying, industry terminology, SAT prep words, culinary terms, anything you want. Every entry includes a definition and a grammar label so you understand how to actually use the word, not just what it means. Tap to go deeper: Spot a word you want to explore? Tap the widget and Lock Learn opens directly to that word's topic so you can review, edit, or add related words. Free to start: You get up to 20 vocabulary words completely free, with no trial period and no expiration date. If you want more, a small one-time purchase unlocks unlimited words and there's no subscription. Features: - Lock screen widget that rotates vocabulary every 10 minutes - Organize words into topics and categories - Grammar labels included with every entry - Tap-to-open deep link goes directly to the word currently on your lock screen - Free up to 20 words, one-time purchase for unlimited
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Vocab Builder | Lock Learn |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 11 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone |
| Requires iOS | 16.2 — better | 18.6 |
| Further details — not scored | ||
| Size | 22 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Kamil Demirtas | MaxQ Consulting Services LLC |
In-app purchases
Vocab Builder
- Vocab Pro Weekly3 Days trial$3.997 Days
Lock Learn
- LockLearn$1.99





