Core Three vs Signature
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Core Three
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STAY FOCUSED. GET MORE DONE. Too many tasks? Overwhelmed by endless to-do lists? Core Three keeps you focused on what truly matters by limiting you to just 3 tasks per day. WHY CORE THREE? Research shows that focusing on fewer tasks leads to better completion rates and less stress. Core Three enforces this proven productivity principle with a simple rule: only 3 active tasks at a time. KEY FEATURES - 3-Task Daily Limit โ Focus on your most important tasks without distraction - Smart Backlog โ Store future tasks and let them automatically move to Today when you're ready - Due Dates & Notes โ Add context and deadlines to stay organized - Track Progress โ See your completed tasks and celebrate your wins - Powerful Search โ Find any task instantly across all lists - Clean Design โ Beautiful, intuitive interface that stays out of your way HOW IT WORKS 1) Add your tasks to the Backlog with due dates 2) Move your top 3 priorities to Today 3) Complete them before adding more 4) Review your accomplishments in Done Stop juggling endless tasks. Start finishing what matters.
Signature
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Signature is the cleanest way to create, store, and share your personal signatures on iPhone. Draw with a smooth, pressure-sensitive canvas that faithfully reproduces the feel of pen on paper. Choose from three distinct nib styles โ Fountain, Ballpoint, and Marker โ each with its own ink character, taper, and opacity. Pick your ink color from a curated palette including black, navy, crimson, and forest green, or dial in any custom color you like. Set the canvas background to suit your purpose: transparent for clean overlays, white for a crisp document look, lined for a writing-guide feel, or warm parchment for a classic stationery aesthetic. Every signature you save goes into your personal library, displayed as paper-card thumbnails so you can recognize each one at a glance. Tap any card to view the full detail, rename it, or delete it. Batch-select multiple signatures in edit mode for quick management. When you're ready to use a signature, share it as a PNG image, export it as a PDF, or send it straight to your Photos library โ all from a single tap. Key features: - Three pen styles: Fountain, Ballpoint, Marker - Ink colors: Black, Navy, Crimson, Forest Green, Custom - Canvas backgrounds: Transparent, White, Lined, Parchment - Stroke width control with smooth velocity-based tapering - Save unlimited signatures to your personal library - Rename and delete with undo confirmation - Export as PNG, PDF, or save to Photos - Undo last stroke while drawing - Clean, distraction-free interface with Dark Mode support
Screenshots
Verdict
Core Three and Signature are too close to call on the numbers: across 5 compared parameters โ price, ads, in-app purchases and device support among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Core Three | Signature |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 | 17.0 โ better |
| Further details โ not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | PAUL SHIN GAY | Linh Phan Nhat Khanh |
In-app purchases
Core Three
No in-app purchases
Signature
No in-app purchases






