GRE Vocabulary for iOS

Learn 958 GRE words faster
than flashcards — with Leitner spaced repetition.

Vocab on your lock screen. Quizzes that block Instagram. Three vocabulary games. Zero study sessions needed.

Start Your Free Trial
7 days free · $39.99/yr · Cancel anytime
958 curated GRE words
3 vocabulary games
64 days to full mastery
96× daily passive exposures

See it in action

Block distracting apps
Illustrated flashcards
3 vocabulary games
Match Madness game
Track your progress
Quiz mode
958 words, one app

Three steps. Zero willpower.

1

Vocab finds you

Words rotate on your lock screen, home screen, and StandBy widget. You just glance at your phone — which you already do 96 times a day.

2

Earn your scroll

Block Instagram, TikTok, whatever steals your time. Answer 5 vocab questions to unlock. 90 seconds. Then scroll.

3

Play to remember

Three games encode each word three different ways. Match Madness, Word Scramble, Context Detective. Studying that feels like playing.

Everything you need.
Nothing you don’t.

958 Illustrated Flashcards

Every word has a custom illustration. Visual + verbal = 65% better recall.

Wave System

10 words at a time. Master 8 to unlock the next wave.

Quiz-to-Unlock

Block any app. Answer vocab questions to unlock. Apple’s Screen Time API.

Widgets Everywhere

Lock screen, home screen, StandBy. Words rotate every 30 minutes.

Spaced Repetition

Leitner system decides what you see and when. 3 correct = mastered.

Streaks & Heatmap

Daily streak counter + GitHub-style activity heatmap. Don’t break the chain.

Built on spaced repetition, dual coding theory, and the testing effect — proven to improve retention by 200%+

Simple pricing.

7 days free. Full access. No feature tiers.

Monthly
$7.99
per month
  • All 958 words + illustrations
  • App blocking + widgets
  • 3 games + streaks + heatmap
Start Free Trial
Best value
Annual
$39.99
per year — $3.33/mo
  • Everything in Monthly
  • Save $55.89 vs. monthly
  • Less than one practice test book
Start Free Trial

No charge until Day 8

Questions

How does app blocking work on iOS?
PrepLockin uses Apple’s official Screen Time API — the same technology built into every iPhone. When you try to open a blocked app, a vocab quiz appears instead. Your app usage data never leaves your device.
What are the illustrated flashcards?
Every word has a custom sticker-style illustration designed to visually reinforce its meaning. When you see “abscond” with a sneaky cartoon thief, your brain encodes both a verbal and visual memory. Recall improves by 65% vs. text alone.
Where do the 958 words come from?
Curated and deduplicated from 5 top GRE prep sources including Barron’s High Frequency list. Organized into progressive study blocks. If a word shows up on the GRE, it’s here.
Can I use it without blocking apps?
Yes. Flashcards, games, widgets, waves, streaks, and heatmap all work independently. But students who enable blocking learn significantly faster.
What happens after the free trial?
Everything is fully unlocked during the 7-day trial. We send a reminder on Day 5. Cancel in iPhone Settings before Day 8 and you pay nothing.

Start today. Master all 958 words by June 17, 2026.

Your GRE is getting closer.
Your vocabulary doesn’t have to fall behind.

Download on the App Store
7 days free · $39.99/yr or $7.99/mo · Cancel anytime