Imprimo vs Flash Stack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Imprimo
Transform notes, PDFs, or photos into smart flashcards for effective exam preparation. Utilize spaced repetition and a guided learning mode to build deep understanding and long-term memory retention for demanding courses.
- AI-generated flashcards from notes, PDFs, or photos
- Spaced repetition for long-term memory
- Guided learning mode for deeper understanding
- Offline study capabilities
- Customizable decks and organization
- Home and Lock Screen widgets
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Turn any notes, PDF, or photo into smart flashcards - then remember them for exams with proven spaced repetition. Imprimo helps serious students convert study material into durable, long-term memory. Built for demanding courses like medicine, nursing, law, and engineering. CREATE CARDS IN SECONDS • SmartScan: snap a document and auto-generate cards • Upload PDFs or paste a URL to build a full deck • Write your own cards manually • AI organizes everything into clean, study-ready decks STUDY SMARTER, NOT LONGER • FSRS spaced repetition schedules each card at the perfect moment • Interval previews show exactly when you'll see a card next • Focused review sessions prioritize the cards you're about to forget • Daily due reminders keep you consistent LEARN MODE - UNDERSTAND BEFORE YOU MEMORIZE A calm four-phase flow: Explore → Connect → Practice → Confirm. Build real understanding instead of rote cramming. BUILT FOR FOCUS • Offline-first — study anywhere, sync when you're back online • Organize decks by course, topic, or exam block • Home Screen & Lock Screen widgets for due cards and retention • A calm, paper-like design with light, dark, and themed palettes • Sign in with Apple or Google FREE TO START Imprimo includes a free tier to get going. Imprimo Pro unlocks unlimited cards, AI generation, and sync across devices. Whether you're prepping for the USMLE, the bar, finals, or any exam-heavy course, Imprimo helps you learn it once and remember it for good. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Flash Stack
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Flash Stack helps you build simple flashcard decks, review what is due, and keep track of your progress without clutter. It is especially useful for GCSE revision, A Level revision, mock exam prep, and steady day-to-day study. Create custom decks for topics, formulas, essay plans, key quotes, definitions, case studies, dates, vocabulary, and revision cards for the subjects you actually study. Add cards one at a time, bulk import larger sets, or export a deck when you want to back it up or move it elsewhere. Study sessions focus on the cards that are ready for review. Reveal each answer, rate how well you remembered it, and Flash Stack schedules the next review using the SM-2 spaced repetition approach. Features: - Create unlimited custom decks - Add and edit question-and-answer cards - Bulk import cards from text, CSV, TSV, or JSON files - Export decks as JSON - Review due cards in focused study sessions - Rate cards as Again, Hard, Good, or Easy - Track review activity, retention, streaks, and upcoming workload - Set an optional daily reminder - Built with support for VoiceOver, Dynamic Type, and Reduce Motion - Clear labels, spoken summaries, and accessible study controls - Works without an account Whether you are preparing for GCSE mocks, A Level papers, class tests, or personal study goals, Flash Stack is designed for quick daily revision. Use it for science facts, maths formulas, history dates, English quotes, languages vocabulary, and other exam content you need to remember properly.
Screenshots
Verdict
The clearest difference is in-app purchases: Flash Stack at none against Imprimo's 3. Flash Stack also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Imprimo sells 3 in-app purchases, starting at $3.99 per 7 days. Flash Stack asks for nothing beyond the download.
Imprimo ships an update every 5 days, Flash Stack every 3 days. The most recent releases landed on October 7, 2026 and October 25, 2026 respectively.
| Parameter | Imprimo | Flash Stack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 days | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 27 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Imdad Ismail | Reuben Enterprises Ltd |
In-app purchases
Imprimo
- Imprimo Pro Weekly$3.997 Days
- Imprimo Pro Monthly7 Days trial$12.491 Month
- Imprimo Pro Yearly14 Days trial$74.991 Year
Flash Stack
No in-app purchases









