Kase₄ vs Notes Book PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kase₄
This app allows you to create and manage your own personal databases on your device. It offers flexibility in designing structures to track anything important, with features like inter-linked data, full-text search, and various field types. Your data remains private and accessible offline.
- Design custom databases
- Inter-linked data
- Full-text search with NLP
- Multiple field types
- Markdown support
- Passcode and biometric lock
- Data visualization (Formatters)
- OCR for text recognition
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Kase exists because it should. There should be a database app that can go anywhere with you. It should be: • Simple — Using it should be easy and intuitive, • Flexible — Once familiar with the basics, you can design any database to track anything important to you, and • Relational — Inter-linked data is an order of magnitude more useful. Plus, you don't want to repeat yourself. Additionally, it should be: • Personal — You should not need to worry about who can peek into your data, and • Always Available — High-speed wireless network should *not* be a prerequisite for accessing your own data. Structured data at your fingertips. Something like that didn't exist, so I started creating Kase in 2014. Basic Concepts: • Your Kase contains Boxes. • Each Box stores Decks that can relate to each other. • A Deck collects similarly structured Cards. • And a Card is where you put data Entries. Features: • Pick, assign, and organize with Categories, Tags, and Marks. • Search by name, notes, full text, or keywords: Full-text indexing with Natural Language Processing. • Highlight any Box, Deck, Card, Entry, or Keyword. • Deck definitions support inheritance! • Field types include Text, Number (with Unit), Money (with Currency), Date/Time (with Time Zone), Choice, Boolean, Link, Picture, and Document. - complete with multi-level auto-conversion • Write in Markdown and see rich formatted text. • Box can be locked with a passcode, and unlocked with Face ID or Touch ID. • Formatters (Fx) to visualize data in different ways without altering the data one bit. e.g. Unit Converter, NameMapper, WordScrambler, ICU Transformers... • Side-by-Side: Compare Cards easily by displaying in columns. • On-device Text Recognitions (OCR) for multiple languages. • Import/Export in CSV, JSON, or KASE. • Complete Backup & Restore. • iPad Multitasking support: Split View, Slide Over, etc. • Very customizable UI with custom locales What Kase Can't Do: - Cloud sync is not done yet (stay tuned...) What Kase Can Do: > From Data to Wisdom > Data ▹ Information ▹ Knowledge ▹ Wisdom 1. Store Data — the objective truths. 2. Organize Information — to reflect circumstances and current condition. 3. Systematically retrieve Knowledge — utilized for decision-making. 4. And that hopefully enables you to grasp Wisdom, comprehend insights, and ultimately create value. There are databases that belong to the Big Guys. The rest of them should stay personal. By now, you should realize how valuable your data is. So why give it away? Kase keeps your data yours. See www.wisd.com/kase for more details. Terms of Use (EULA): https://www.wisd.com/kase/eula
Notes Book PRO
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Notes Book PRO is the ultimate application for organizing your ideas and projects in total security. With its code-lock feature, you can protect each note individually, guaranteeing the confidentiality of your most sensitive information. This innovative application lets you create notes in a variety of distinct formats: Notebooks : Organize your notes into thematic sets, creating dedicated notebooks for projects, studies or any other category close to your heart. Text Notes: Write your thoughts and ideas clearly and concisely, using advanced formatting tools to personalize your notes. Voice Notes: Capture your thoughts on the fly by recording audio messages, ideal for spontaneous thoughts or ideas you want to keep. Tables: Create tables to organize and structure your information, perfect for lists, comparisons or data analysis. Drawing: Express your creativity with intuitive drawing tools, enabling you to create illustrations and sketches directly in your notes. Shortcut Lists: Never lose your favorite shortcuts for common software programs. Create customized lists to remember everything you need, right at your fingertips. What's more, Notes Book PRO offers a hierarchical view of all your notes, making it easy to organize and navigate through your ideas. Whether you're a student, professional or creative thinker, this application is designed to adapt to all your note-taking needs, while giving you the security and flexibility you need to manage your thoughts effectively. to consult the term of use, please follow this link (EULA) ici: https://privacy-notes-pro.netlify.app/termsOfUse to consult the privacy policy, please follow this link: https://privacy-notes-pro.netlify.app/
Screenshots
Verdict
The clearest difference is price: Notes Book PRO at Free against Kase₄'s $9.99. On update cadence, 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
Notes Book PRO is free to download; Kase₄ costs $9.99 up front. Kase₄ sells 4 one-off in-app purchases and Notes Book PRO sells 9 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.
Kase₄ ships an update every 2 months, Notes Book PRO every 5 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Kase₄ | Notes Book PRO |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 17 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Kenneth Wong | Dylan Zaoui |
In-app purchases
Kase₄
- Tip: Dollar$1.00
- Tip: Coffee$2.00
- Tip: Coffee, CA$4.00
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- Tip: Caffè Mocha$5.00
Notes Book PRO
- All features for 1 month.$0.491 Month
- All features for 3 months$0.993 Months
- All features for 6 months.$1.996 Months
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- Premium access for 1 month$1.991 Month
- All features for 1 year.$3.991 Year
- Premium access for 3 months$3.993 Months
- Premium access for 6 months.$4.996 Months
- Premium access for 12 months$8.991 Year
- All features for life$3.99









