Caldy vs Deep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caldy
This app offers a visual approach to calculations, linking values with arrows and allowing for dynamic editing of expressions. It supports organizing calculations into documents, plotting expressions, and includes various math functions. Ideal for complex calculations beyond basic arithmetic.
- Visual calculation linking
- Editable expressions with automatic updates
- Document-based organization
- Plotting and zooming capabilities
- Trigonometry and math functions
- Dark mode support
- Export sheets as images
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When you need more than a basic calculator, but do not want a spreadsheet. Caldy is a visual calculator: linked values are clearly shown with connecting arrows. The history is right in front of you. Caldy is a dynamic calculator: any number or operation can be changed and the linked expressions are updated automatically. Numbers can have labels, making the expressions easier to read. Results can be dragged and dropped on placeholders to connect expressions. Sub-expressions can be extracted to structure complex calculations. Sub-expressions can be extracted to structure complex calculations. Caldy percentage increase function, very handy to calculate tips or tax such as VAT. Caldy can plot expressions. Plots are zoomable and dynamic as well. Pinch on the plot to zoom in or out. Caldy is document-based. You can organize your calculation sheets like files, on your device or even on iCloud. Caldy has math functions, trigonometry functions. Caldy supports dark mode. All Clear button to clear the sheet. Undo and redo buttons. Cursor move buttons (left and right). Export to share the sheet as an image. A new intuitive calculator. - Familiar interface - Edit expressions anywhere anytime, results are updated automatically - Multiple sheets - Plots, pinch to change X range - Dark mode - Trigonometry functions, exponential, logarithm, percentage increase, absolute function - Add labels to numbers - Swap operands, extract subexpressions, move expressions
Deep
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Deep is your companion on the journey to mastery, built around the famous 10,000-hour rule. Whether you're learning to code, mastering an instrument, or developing expertise in your profession, Deep helps you track the deliberate practice needed to achieve true expertise. With a simple tap, you can start a focused session, and Deep automatically logs your time. Your hours are organized by day, week, and month, giving you a clear view of your progress toward the 10,000-hour milestone. Deep’s clean and distraction-free interface ensures that you stay focused on what truly matters—putting in the hours. Deep also provides a clear, visual representation of your progress, helping you stay motivated as you move closer to mastery. The experience is streamlined and free of unnecessary features, making it easy to focus on consistent practice. Privacy is built into Deep’s core. Your data remains yours, with no tracking or data collection, giving you complete peace of mind while you focus on your craft. Deep makes it simple to stay committed to your goals. Every session brings you one step closer to mastering your chosen pursuit. EULA : https://iamrahulrao.notion.site/End-User-License-Agreement-EULA-170aa0e3dde080709a69f57e161ddbc3 Privacy policy: https://iamrahulrao.notion.site/Privacy-Policy-04124276404f4a6abf4ffd2f0f5fa198
Screenshots
Verdict
The clearest difference is price: Deep at Free against Caldy's $2.99. Caldy's advantage is update cadence (fortnightly vs every 17 months). On ads, in-app purchases, 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
Deep is free to download; Caldy costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Caldy ships an update fortnightly, Deep every 17 months. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.
| Parameter | Caldy | Deep |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 2.0 (2 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Fortnightly — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Alventir Ltd | Rahul Rao |
In-app purchases
Caldy
No in-app purchases
Deep
No in-app purchases









