Peek vs FlashStacks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Peek
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Do you want to learn languages naturally by picking up new words and vocabulary through quick daily glances? Welcome to Peek – a passive language learning app that lets you learn new languages directly from your home screen. Peek is designed for language learners who want to learn new languages through natural repetition and simple exposure to vocabulary and phrases throughout the day. Instead of opening the app for lessons or studying flashcards manually, it helps you learn by showing automatic flashcards on your home screen widget throughout the day. Whether you are checking your phone during the day, working, or relaxing, Peek lets you improve your vocabulary recognition and language familiarity without pressure or complicated lessons. How to Use Peek? 1. Install the app 2. Add the widget on your home screen 3. Start learning from daily glances Just install Peek and add the smart widget to your home screen. The widget will automatically display flashcards with new words and phrases throughout the day so you can learn naturally while checking the time, notifications, or weather. You don’t need to open the app constantly. Every quick glance at your phone becomes a small learning moment. Key Features of Peek: Passive language learning: Learn languages naturally through auto-updating flashcards that appear on your home screen widget. Home screen widget learning: Smart flashcards appear directly on your home screen, turning everyday screen checks into learning opportunities. Create your own flashcards: Add your own words, phrases, and translations to personalize your learning experience and focus on what matters most to you. Natural daily exposure: Dozens of quick exposures each day help your brain remember vocabulary effortlessly over time. Smart vocabulary building: Common words and useful phrases repeat naturally to help improve memory and recognition. Simple and stress-free learning: No long sessions, no pressure, and no need to open the app constantly. So why wait? Install Peek, add the widget to your home screen, and turn your everyday screen time into a simple language learning habit. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
FlashStacks
Transform study materials into interactive Home Screen widgets. AI generates flashcards from PDFs, and spaced repetition optimizes learning. Visualize concepts with image occlusion and track progress with detailed stats.
- Home and Lock Screen widgets
- AI-powered PDF to flashcard generation
- Spaced repetition learning
- Image occlusion cards
- Progress tracking and stats
- Customizable widget themes
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Your flashcards, on your Home Screen. FlashStacks turns your study cards into beautiful Home Screen and Lock Screen widgets. Glance at a question between classes. Tap to reveal the answer. Move to the next card — all without opening the app. Learning fits into the moments already filling your day. Always visible, always ready Your stacks live as widgets that rotate automatically throughout the day. Every time you check your phone, there's something new to learn. Tap to reveal, tap to advance. AI-powered deck generation Upload any PDF — lecture notes, textbook chapters, study guides — and AI instantly creates a complete flashcard deck. Choose high-yield mode for exam prep or comprehensive for full coverage. Every card is widget-ready from the start. Spaced repetition that works FlashStacks uses the same proven science behind Anki. Cards you struggle with come back sooner. Cards you've mastered fade into the background. Study smarter, not longer. Image occlusion cards Add any image — diagrams, anatomy, maps — and draw boxes over areas to hide. Tap to reveal what's underneath. Perfect for visual subjects. Beautiful by design Every stack gets its own colour palette — soft pastels or bold modern tones. Widgets match your stack's colours. Dark mode uses pure OLED black. Track your progress Per-stack stats show mastery level, difficulty breakdown, and 14-day activity. Build a streak. Hit your daily goal. FlashStacks Premium Create unlimited stacks, generate decks from PDF with AI, add image occlusion cards, and study from your Lock Screen. Monthly and annual plans available. 3-day free trial included with annual. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: FlashStacks at weekly against Peek's every 3 weeks. On price, ads, in-app purchases and device support 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. Peek sells 2 in-app purchases, starting at $4.99 per month and FlashStacks sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Peek ships an update every 3 weeks, FlashStacks weekly. The most recent releases landed on September 27, 2026 and October 12, 2026 respectively.
| Parameter | Peek | FlashStacks |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (8 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone | iPhone |
| Requires iOS | 18.2 | 17.6 — better |
| Further details — not scored | ||
| Size | 27 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Melvyn Hoarau | Bailey Skewes |
In-app purchases
Peek
- Peek+ Monthly$4.991 Month
- Peek+ Annual$29.991 Year
FlashStacks
- FlashStacks Premium — Monthly$4.991 Month
- Premium Special Offer$24.991 Year
- FlashStacks Premium — Annual1 Month trial$39.991 Year









