Calivora vs Delta Number Deduce
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calivora
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Calivora is a creator community focused on leathercraft. Here, you can discover independent leather artisans, browse authentic workshop records, and learn about the complete process behind each piece—from material selection, pattern making, cutting, and skiving to stitching and edge finishing. We believe that the value of a piece lies not only in the finished product, but also in the decisions, experience, and dedication involved in making it. On Calivora, you can: Discover leather artisans and workshops with different styles Browse leather goods, making records, and craft notes Watch short videos showing the leather-making process Learn about vegetable-tanned leather, hand stitching, leather carving, restoration, and edge finishing Explore the materials, tools, and workbench records commonly used by artisans Save your favorite works and artisan profiles Like, comment, and discuss specific details of the making process Follow creators who continuously share their work and craft experience Create your own artisan profile Publish your works, material choices, making methods, and projects in progress From the first paper pattern to the final polishing, every workshop has its own rhythm, and every piece has a process worth documenting. Calivora aims to provide leather artisans and craft enthusiasts with a focused, authentic, and easy-to-use space for communication. Here, discover inspiration, document your making process, share your experience, and help more people see the marks left by human hands. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Delta Number Deduce
Engage your mind with dynamic numerical puzzles. Discover hidden patterns, fill in missing numbers, and optimize your strategy to earn stars. This game offers a variety of difficulty levels to sharpen your deductive reasoning skills.
- Numerical difference matrix puzzles
- Procedural puzzle generation
- Star rating system
- Real-time validation
- Customizable difficulty
- Local save functionality
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Solve dynamic numerical‑difference matrix puzzles. Figure out hidden patterns, fill blanks and optimize your steps for higher stars. Levels feature unique multi‑order difference rules from easy to expert. Train your deductive logic. Features: procedural puzzles, star rating, real‑time validation, custom difficulty, local saves, ad‑supported hints.
Screenshots
Verdict
Calivora and Delta Number Deduce are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
Calivora ships an update weekly, Delta Number Deduce every 2 weeks. Both last shipped on October 26, 2026.
| Parameter | Calivora | Delta Number Deduce |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15 — better | 16.0 |
| Further details — not scored | ||
| Size | 63 MB | 16 MB |
| Age rating | 17+ | 17+ |
| Developer | Chase Frederick Montclair | Willa Balingit |
In-app purchases
Calivora
No in-app purchases
Delta Number Deduce
No in-app purchases









