# Inkstone: PDF to AI Flashcards — Spaced Repetition & Anki Study

> Spaced Repetition & Anki Study (iPhone/iPad app by NanJing ChunChun Technology Co. Ltd..)

- Source: https://appshunter.io/ios/app/inkstone-pdf-to-ai-flashcards/id6783705031 (this page in markdown: same URL + `.md`)
- Developer: [NanJing ChunChun Technology Co. Ltd.](https://appshunter.io/developer/6782788076)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 45 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-07-02
- Data updated: 2026-10-25

## What is Inkstone?

Inkstone is the beautiful, AI-powered flashcard app that helps you learn faster and remember longer — whether you're preparing for a major exam, picking up a new language, or earning a professional certification.

Start instantly with 140+ expertly written decks (13,900+ cards) across 8 fields, or turn any PDF or pasted notes into a custom deck in seconds. Every review is scheduled by a proven spaced-repetition engine, so you see the right card at exactly the right moment — and an AI tutor is one tap away whenever something doesn't click.

WHY INKSTONE
• 140+ expert decks, 13,900+ cards — ready to study right now
• Smart spaced repetition (FSRS) for maximum retention in minimum time
• AI Tutor — tap "AI Explain" on any card for a clear, patient explanation
• Create your own decks — upload a PDF or paste notes and let AI build the cards (OCR handles scanned pages and formulas)
• Import your Anki decks (.apkg / .csv) — images, audio, cloze and image occlusion supported
• A calm, warm notebook design that makes studying feel good
• Your progress syncs across devices

LEARN ANYTHING
• Languages — Spanish, French, German, Japanese, Korean, Italian, Chinese (HSK), Portuguese, Russian, TOEFL & IELTS
• Medical & Nursing — USMLE Step 1 & 2, NCLEX, MCAT, anatomy, physiology, pharmacology, pathology
• Test Prep — SAT, ACT, GRE, GMAT, LSAT, AP exams, GED
• Certifications — Bar Exam, CPA, CFA, PMP, Series 7, CompTIA, AWS, CISSP
• Science & Math — biology, chemistry, physics, calculus, statistics, linear algebra
• Humanities — history, economics, psychology, philosophy, sociology

HOW IT WORKS
1. Pick a deck — or create one from your own material
2. Study with active recall: see the question, recall the answer, rate how well you knew it
3. Inkstone schedules each card for the perfect time to review
4. Stuck? Ask the AI tutor and keep moving

Inkstone is free to download and start studying. Inkstone Pro unlocks the AI tutor, unlimited Anki imports, and every premium deck.

Learn more, remember more — with Inkstone.

---
Every claim matches the actual app (140 decks/13,912 cards, FSRS, AI Explain, PDF→deck with OCR, Anki import with image occlusion, progress sync, Pro tier).
— Inkstone Pro Subscription —
Inkstone Pro is an auto-renewable subscription (Monthly / Annual / Lifetime).
Payment is charged to your Apple ID at confirmation of purchase. It auto-renews
unless canceled at least 24 hours before the end of the current period. Manage or
cancel anytime in your Apple ID settings.

Terms of Use (EULA): https://inkstonecard.xyz/terms
Privacy Policy: https://inkstonecard.xyz/privacy

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Inkstonecard Pro (Monthly) | $7.99 | per month |
| inkstone_pro_yearly | $49.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Inkstone Pro (Lifetime) | $149.99 | one-time |
| 100 Page Credit Pack | $5.99 | one-time |
| 300 Page Credit Pack | $14.99 | one-time |
| 500 Page Credit Pack | $21.99 | one-time |
| 1000 Page Credit Pack | $39.99 | one-time |


## Is Inkstone safe?

Not enough ratings yet to assess Inkstone.

## Is Inkstone legit?

Inkstone: PDF to AI Flashcards has limited verification signals. The AppsHunter Legitimacy Score for Inkstone is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 5.0.0 — 2026-10-08

Meet the Forgetting Beast — your AI deck wizard. A friendly floating pet guides you through turning PDFs, photos, and notes into custom flashcards, asking the right questions along the way. Also in 5.0.0: a stunning Galaxy deep-space theme (now the default), deck chapters for structured study, up to 100 photos per card-making batch, full Anki template support, and polish across the app.

### 4.0.1 — 2026-10-03

Refreshed App Store screenshots for a clearer product tour.

### 4.0.0 — 2026-09-28

A brand-new Inkstone, fully redesigned: • New design system with six beautiful themes (Ink, Journal, Sakura, Taro, Night, Paper) • Guest mode — start studying instantly, your progress merges when you sign in • Study teams — pair up or form study groups with preset messages and weekly leaderboards • Share market — discover and share Anki decks with one-tap import • Daily check-in — build your streak and earn free AI card-generation pages • My Decks hub — manage your generated decks in one place • Profile nicknames and avatars • New AI card types: compare, list, case study, detailed, reversed • Faster, more reliable downloads

### 3.0.0 — 2026-09-22

All-new Clay design — a playful, tactile look across every screen, with 4 themes (Clay Light, Clay Dark, Ink Mono, Clay Pop).

New in 3.0.0:
• Listen Mode: hands-free text-to-speech read-through of your cards
• Spelling & dictation practice for vocabulary decks
• Photo-to-flashcards: snap textbook pages and turn them into cards
• AI generation enhancements: multiple choice, cloze, mnemonics, etymology, key highlights
• Study loop: today's task dashboard, study goal countdown, review reminders, leech-card mode, quizzes, weekly report and activity heatmap
• Deck management: rename decks, browse and edit cards, update notifications
• Smoother studying: faster card flips, no flicker, long-card scrolling fixed
• In-app account deletion, plus reliability and billing fixes

### 1.0 — 2026-07-02

No release notes.

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## More apps by NanJing ChunChun Technology Co. Ltd.

- [Daylit: Mood Journal](https://appshunter.io/ios/app/daylit-mood-journal/id6783223517)

All apps by NanJing ChunChun Technology Co. Ltd.: https://appshunter.io/developer/6782788076

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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 2026-10-25.*