Kase₄ vs Folio
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
Folio
Organize anything with customizable digital notebooks. Track finances, habits, books, and more with over 30 templates. Integrates with Siri and VoiceOver for hands-free use.
- Over 30 ready-made templates
- Customizable fields and statuses
- Siri and VoiceOver integration
- Dates, reminders, and recurrence
- iCloud sync across devices
- History and archive of completed lists
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Folio turns anything you need to keep track of into a notebook you can actually use: groceries and errands, bills and subscriptions, medication and habits, books to read. Over 30 ready-made templates, each with its own fields, statuses and reminders — and every screen works perfectly with Siri and VoiceOver. READY-MADE TEMPLATES • Finance: Payments, Expenses, Subscriptions, Debt/Credit • Content: To Read, To Watch, To Listen • Special Days & Travel: Birthdays, Places to Go, Packing • Routines: Habits, Chores, Maintenance, Plant Care, Pet Care, Exercise • Processes: Applications, Project Tracking, Awaiting, Orders, Loans • Personal Tracking: Inventory, Meal Plan, Courses, Goals, Attendance, Vaccinations • Shopping, To-Do, and a completely blank notebook to start from scratch HANDS-FREE WITH SIRI • "Add to Folio": Siri asks which notebook and what to add, then keeps going with "Anything else?". • "What's on tomorrow in Folio", "What's next in Folio", "What did I do yesterday in Folio". • "When did I last do it in Folio" — perfect for medication, watering plants or feeding pets. • "Read what's left in Folio": long lists are read five at a time. • Every command is listed in Settings > Siri & Shortcuts > All Siri commands. DESIGN IT YOUR WAY • Customize each notebook's fields, statuses, and order with the Field Designer. • Build your own templates, then use or remove them from the template picker. • Organize notebooks into folders, pin the ones that matter most. DATES, REMINDERS & RECURRENCE • Add a date, time, and reminder to any item. • Set daily, weekly, monthly, yearly, or completion-based recurrence rules. • Overdue items automatically surface to the top. FULL VOICEOVER SUPPORT • Folio was designed from day one for VoiceOver users — every screen and action is announced clearly. • Status changes, delete/undo, and list updates are announced instantly. • Haptic and sound feedback are fully customizable in Settings. HISTORY & ARCHIVE • Save a snapshot of completed lists to history and review them anytime. • Deleted notebooks and items wait in Trash for a while before you decide. ICLOUD SYNC, NO ACCOUNT NEEDED • Folio doesn't ask you to create an account — it just uses the iCloud account already on your device. • Your notebooks sync automatically across your devices; nothing is stored on Folio's own servers. Your first 2 notebooks are free forever, fully editable — no payment info, no time limit. Need more? Unlock unlimited notebooks, custom templates, folders, and full JSON backup with monthly, yearly, or one-time Lifetime Folio Pro; plain text and CSV export are always free. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Folio at Free against Kase₄'s $9.99. Folio also leads on update cadence (weekly vs every 2 months). Kase₄'s advantage is iOS requirement (15.0 vs 17.0). On rating, ratings volume, ads and in-app purchases 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
Folio is free to download; Kase₄ costs $9.99 up front. Kase₄ sells 4 one-off in-app purchases and Folio sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Kase₄ against 5.0 for Folio. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Kase₄ ships an update every 2 months, Folio weekly. Both last shipped on November 3, 2026.
| Parameter | Kase₄ | Folio |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Kenneth Wong | RECEP GUR |
Customer experience
Kase₄
Folio
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
Folio
- Folio Pro Monthly$3.991 Month
- Folio Pro Yearly$29.991 Year
- Folio Pro Lifetime$69.99









