GRE Vocabulary for iOS

The GRE vocab app that
blocks TikTok & Instagram until you study.

958 words. Illustrated flashcards. Three vocab games. Spaced repetition. And the only app that turns your phone against your worst habits.

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
Now Live on iOS

Open TikTok?
Not until you study.

PrepLockin uses Apple’s official Screen Time API to block any app you choose. When you try to open it, a GRE vocab quiz appears instead. Answer 5 questions. 90 seconds. Then scroll guilt-free.

  • You pick which apps to block
  • Uses Apple’s FamilyControls — not a hack
  • Your data never leaves your device
  • 5 questions, ~90 seconds to unlock
PrepLockin shield screen

GRE Study Blocks

Explore GRE Vocabulary

View all 958 GRE words

Simple pricing.

7 days free. Full access. No feature tiers.

Monthly
$7.99
per month
  • All 958 GRE words
  • App blocking + widgets
  • 3 games + streaks + heatmap
Start Free Trial

Questions

Where do the 958 GRE words come from?
Curated and deduplicated from 5 top GRE prep sources including Barron’s High Frequency list, Vocabulary.com’s Roadmap series, and quantitative reasoning terms. Organized into 5 progressive study blocks.
How does app blocking work on iOS?
PrepLockin uses Apple’s official FamilyControls framework — the same Screen Time technology built into every iPhone. You choose which apps to block. When you tap a blocked app, a branded shield appears with a 5-question vocab quiz. Answer correctly and the app unlocks. All data stays on your device.
Can I use it without blocking apps?
Yes. Flashcards, games, widgets, spaced repetition, 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. Cancel in iPhone Settings before Day 8 and you pay nothing.
Is this enough for the GRE verbal section?
Our 958 words cover all the high-frequency vocabulary tested on the GRE. Combined with spaced repetition and daily practice through app blocking, most students see significant score improvements in 8–10 weeks.

Start today. Master all 958 GRE words by June 23, 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