# 21st Night

> 21st Night (iPhone/iPad app by JustAddTutor LLC.)

- Source: https://appshunter.io/ios/app/21st-night/id1524265425 (this page in markdown: same URL + `.md`)
- Developer: [JustAddTutor LLC](https://appshunter.io/developer/1524265427)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 48 MB
- Languages: English
- Released: 2021-03-24
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/21st-night/id1524265425/reviews.md

## What is 21st Night?

21st Night is the best flashcard web app for tutors and test-takers. This is a companion app that allows you to review your flashcards on the go.

Personalized review
21st Night uses spaced repetition and calculates optimal study intervals.

Study plan
Keep on track with a personalized study plan.

Offline access
Review anytime anywhere with full offline support.


## Version history (last 2 releases)

### 3.0 — 2021-09-16

- Added ability to create, edit, and delete decks, cards, notes, and tasks from within the app.
- Added analytics and cheat-sheet to decks
- Minor bug fixes and usability improvements

### 2.0 — 2021-03-24

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*