The Stack vs 100 Notes Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Stack
This app offers a straightforward approach to managing tasks and capturing thoughts. It utilizes a single list of text-based notes organized with hashtags for easy retrieval and organization.
- Simple text-based notes
- Hashtag organization
- Easy idea capture
- To-do list management
- Streamlined interface
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The Stack is a different take on To-Do List management. It favours simplicity, and encourages easy capture of your thoughts ("notes to self") as you have them. It uses a single list of simple text-based notes, organised using #hashtags.
100 Notes Studio
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100 Notes Studio is a private, offline workspace for handwriting, typed notes, PDF markup, page-attached audio recordings and study. WRITE WITH CHARACTER 29 distinct pens and brushes — fountain pen, calligraphy, fude brush, technical pen, watercolor wash, charcoal, mechanical pencil (2B/4B/6B) and more — each with its own texture and stroke response. Pressure and tilt shape supported strokes, while palm rejection helps prevent stray marks. Pixel, whole-stroke, and precision erasers handle corrections. Use the lasso to move, scale, copy, or delete strokes, plus a ruler, eight shape tools, and a laser pointer for presentations. 100 DISTINCT NOTEBOOK STYLES Each Studio Style has its own cover, paper structure, color palette, dividers, stamps or stickers, toolbar accent, and widget appearance. The collection includes minimal, linen, Japanese grid, academic, engineering, music, meeting, research, planner, travel, wellness, recipe, creative, and dark-paper systems. Browse and preview all 100 styles before choosing one. MORE THAN A CANVAS Fixed pages or an infinite canvas, with A4, A5, Letter, screen, and custom sizes in portrait or landscape Formatted text with bold, italic, underline, fonts, colors, lists, checklists, tables, and links PDF import and markup with highlights, underlines, strike-through, text notes, handwriting, rotation, cropping, page insertion, extraction, merging, and export Audio recordings attached to the page you choose On-device handwriting and PDF text recognition, with search across titles, body text, handwriting, and attachments Study tools with linked flashcards, cloze cards, and FSRS spaced repetition Stickers, washi tape, and an auto-numbered table of contents Nested folders, tags, pins, favorites, archives, recoverable trash, and restorable page history Ink layers with opacity, visibility, and locking, plus a reference view that keeps a PDF or image beside the page Widgets and quick capture for faster access PRIVATE BY DESIGN No account, ads, third-party tracking or analytics, and no external AI. Editing, search, and study work offline. Notes stay on your device unless you choose to export or back them up. Lock the workspace or an individual notebook with device authentication. FREE CORE, OPTIONAL ONE-TIME UPGRADE The free version includes the core editor, 29 writing tools, PDF markup, page audio attachments, handwriting search, and study tools, with 1 active notebook of up to 5 pages and 2 of the 100 styles. An optional one-time upgrade adds unlimited notebooks and pages, all 100 styles, vector-ink PDF export, restorable page history, and encrypted backup. A focused home for handwriting, documents, and study. Privacy Policy https://alice51849.github.io/100notes-support/privacy.html Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: 100 Notes Studio at every 5 days against The Stack's every 5 weeks. 100 Notes Studio also leads on iOS requirement (17.0 vs 26.0). 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. The Stack sells 3 one-off in-app purchases and 100 Notes Studio sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
The Stack ships an update every 5 weeks, 100 Notes Studio every 5 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.
| Parameter | The Stack | 100 Notes Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Elegant Chaos Limited | Guan Feng Lai |
In-app purchases
The Stack
- Fresh Straw$0.99
- A Nice Juicy Carrot$2.99
- Deluxe Hamster Wheel$9.99
100 Notes Studio
- Lifetime Studio$5.99









