FastCalc vs Perenne Note. Digital Notebook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FastCalc
This calculator app offers a streamlined experience with large, easy-to-use keys and an innovative gesture-based interface. It displays your ongoing expression and results in real-time, eliminating the need for an equals button. Advanced features include percentage calculations and customizable constants.
- Large, practical keys
- Permanent expression display
- Automatic real-time results
- Gesture-based input
- Customizable constants
- Advanced percentage mode
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FastCalc is a calculator recognized for its efficiency and ease of use. It stands out thanks to: • its large keys, which allow for fast and accurate input, • the permanent display of the expression entered by the user, • the automatic display of the result while typing: no “=” key required! FastCalc is thus suitable both for everyday calculations and for more advanced use. BASICS OF USE The interface of FastCalc is innovative and minimalist, entirely based on simple gestures: • Select a side symbol on a key: slide your finger in its direction. • Delete the last entered elements: make a small swipe to the left on the display. • Clear the entire expression: swipe quickly to the left across the whole display. • Store a result in a memory: tap the result and choose the desired memory. FEATURES • Large, practical, and easy-to-read keys. • Customizable constants. • Advanced mode for percentage calculations. • Permanent display of the current expression and temporary memories. • Automatic storage of the previous result (ANS) each time an expression is cleared. • Integrated help videos and user guide (in ⓘ). SETTINGS • Enable interface sounds and adjust their volume. • Enable advanced mode. • Choose the number of displayed decimals and the thousands separators. • Customize the colors of the keypad and the expression.
Perenne Note. Digital Notebook
A minimalist digital notebook designed for iPad and iPhone, offering a realistic writing and sketching experience with Apple Pencil. Organize notes, sketches, and lists with customizable notebooks and real-time syncing.
- Realistic pen and pencil tools
- Customizable notebooks and paper styles
- iPhone companion app with iCloud sync
- Quick notes with rich text and checklists
- Reminders and calendar integration
- Desk feature for floating elements
- PDF and PNG export options
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A real notebook, on your iPad. Write with Apple Pencil on pages that feel like paper, with a pencil that leaves real graphite grain and a pen that follows your hand. Perenne Note is made for people who think better with a pen in hand. No infinite canvas, no AI, no features you'll never use: just notebooks, planners and your ideas. Plus a free iPhone app to keep them with you. WRITES LIKE PAPER Pen, fountain pen, pencil and highlighter, powered by Perenne Engine, the drawing engine we built from scratch: real scanned graphite, paper grain that responds to every stroke, tilt and pressure in every line. Any width, opacity and color, eyedropper included. Turn on real notebook mode to flip pages with your finger and write with your Pencil, without switching modes. NOTEBOOKS THAT FEEL REAL 3D covers in 10 colors, 5 textures or your own photo. Blank, ruled, grid or dotted paper, or design your own with the pattern editor. Up to 100 pages, two-page spreads in landscape, colored bookmarks and over 280 stickers: stamps, postmarks and decorations. DATED PLANNERS Daily or weekly, in six styles you can switch anytime without losing a line of what you wrote. Tap a day to open it, tap the date to see the month. If you like, your Calendar events and your Reminders to-dos appear right on the pages, ready to check off with your finger or a mark of your Pencil. Your first planner is free to try. AUDIO NOTES Record a lecture or a meeting right on the page, even with the screen locked. Where your language supports it, transcription happens on your device: your voice goes nowhere else. ON YOUR IPHONE, FREE Your notebooks and planners in your pocket: flip through your pages as you wrote them, search everything and catch ideas on the go with quick notes. Text, checklists, tables, photos and audio, ready to place on the page back on your iPad. REMINDERS THAT TAKE YOU BACK Circle anything with the lasso and set a reminder: the notification arrives with your handwriting and takes you right back to that page. One-time or repeating, in your Calendar too. THE DESK Around your notebook there's room for sticky notes, photos and text you want to keep in sight while you write. Write on the notes, draw on the photos, move, rotate and resize everything. PRIVATE, NO ACCOUNT No sign-up and no ads. Your notebooks and notes stay yours and sync between iPad and iPhone through your own iCloud. Export pages or whole notebooks as PDF or PNG anytime. MADE TO FIT YOU Toolbar at the top or bottom, controls on the side of your writing hand, gestures to undo, keyboard shortcuts. In 14 languages, ready for iOS 27 and iPadOS 27. YOUR YEAR Pages written, days in a row and, at the end of the year, an animated recap of everything you created. TRY IT FREE Start with a notebook and 6 pages to try everything, and try your first planner for free. Then it's your choice: a single notebook or planner as a one-time purchase, or a subscription for unlimited use, with a free week on the annual plan. Privacy Policy: https://perenne.app/privacy-policy Terms of Use (EULA): https://perenne.app/terms-of-service
Screenshots
Verdict
The clearest difference is price: Perenne Note. Digital Notebook at Free against FastCalc's $1.99. Perenne Note. Digital Notebook also leads on update cadence (weekly vs every 5 months) and iOS requirement (17.6 vs 26.0). FastCalc's advantage is rating (4.8 vs 3.8) and review sentiment (80% vs 50%). On ratings volume, 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
Perenne Note. Digital Notebook is free to download; FastCalc costs $1.99 up front. FastCalc sells 4 one-off in-app purchases and Perenne Note. Digital Notebook sells 5 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
FastCalc holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews point the same way: 80% of FastCalc's written reviews are positive against 50% of Perenne Note. Digital Notebook's.
FastCalc ships an update every 5 months, Perenne Note. Digital Notebook weekly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | FastCalc | Perenne Note. Digital Notebook |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (4 ratings) — better | 3.8 (5 ratings) |
| Positive reviews | 80.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 4 | 5 — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 17.6 — better |
| Further details — not scored | ||
| Size | 8 MB | 61 MB |
| Age rating | 4+ | 17+ |
| Developer | Andre Ponzo | Nicholas Compagnoni |
Customer experience
FastCalc
Perenne Note. Digital Notebook
In-app purchases
FastCalc
- Red Rivella$1.99
- Homemade hot chocolate$6.99
- Bircher muesli$12.99
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- Moitié-moitié fondue$34.99
Perenne Note. Digital Notebook
- Monthly$2.991 Month
- Annual7 Days trial$22.991 Year
- Single Notebook$3.99
- Yearly Planner$6.99
- Notebook Bundle$8.99
Questions
Is FastCalc free?
Is Perenne Note. Digital Notebook free?
Which has better reviews, FastCalc or Perenne Note. Digital Notebook?
Do FastCalc or Perenne Note. Digital Notebook have ads?
Which is updated more often, FastCalc or Perenne Note. Digital Notebook?
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