Comparison

Calivora vs Delta Number Deduce

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calivora

Features
Read full description

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/

About

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.

Highlights
  • Numerical difference matrix puzzles
  • Procedural puzzle generation
  • Star rating system
  • Real-time validation
  • Customizable difficulty
  • Local save functionality
Features
Read full description

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

Calivora4 screens
Delta Number Deduce4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Calivora ships an update weekly, Delta Number Deduce every 2 weeks. Both last shipped on October 26, 2026.

ScorecardNo meaningful differences
Calivora versus Delta Number Deduce: the parameters behind the verdict, then further details
ParameterCalivoraDelta Number Deduce
PriceFreeFree
Rating—2.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad
Requires iOS15 — better16.0
Further details — not scored
Size63 MB16 MB
Age rating17+17+
DeveloperChase Frederick MontclairWilla Balingit

In-app purchases

None

Calivora

No in-app purchases

None

Delta Number Deduce

No in-app purchases

Questions

Is Calivora free?
Calivora is free to download, with no in-app purchases.
Is Delta Number Deduce free?
Delta Number Deduce is free to download, with no in-app purchases.
Do Calivora or Delta Number Deduce have ads?
Neither Calivora nor Delta Number Deduce shows ads.
Which is updated more often, Calivora or Delta Number Deduce?
Calivora ships an update weekly, and Delta Number Deduce every 2 weeks. Most recently, Calivora was updated on October 26, 2026 and Delta Number Deduce on October 26, 2026.

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