Kase₄ vs QV.AC
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
QV.AC
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QV.AC is your personal AI assistant - running entirely on your devices. No cloud. No accounts. No surveillance. The most powerful technology of our time, finally yours. Run powerful AI models on the device in your pocket. Add agents and skills that handle your day. Sync everything across your devices through an encrypted peer-to-peer network. No server in the middle, ever. One assistant. Infinite agents. Countless skills. Zero servers. Features - Run state-of-the-art AI models locally - no internet required - Run bigger models on small devices - your phone uses your laptop's compute power, peer-to-peer, no server involved - Hundreds of skills: Calendar, Tasks, Weather, Notes, Music and more - Real AI agents that work for you, not for someone else - On-device image vision and voice transcription - Use your own files and notes as private knowledge - Encrypted peer-to-peer sync across all your devices - Complete privacy - your data never leaves your devices Built for everyone who refuses to rent their intelligence. The infinite personal intelligence era has begun.
Screenshots
Verdict
The clearest difference is price: QV.AC at Free against Kase₄'s $9.99. QV.AC also leads on in-app purchases (none vs 4) and update cadence (weekly vs every 2 months). On ads, 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
QV.AC is free to download; Kase₄ costs $9.99 up front. Kase₄ sells 4 one-off in-app purchases. QV.AC asks for nothing beyond the download.
Kase₄ ships an update every 2 months, QV.AC weekly. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.
| Parameter | Kase₄ | QV.AC |
|---|---|---|
| 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 | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 17 MB | 238 MB |
| Age rating | 4+ | 4+ |
| Developer | Kenneth Wong | Tether Data |
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
QV.AC
No in-app purchases









