PerimeterVaue vs GralvynHalcyoxGrid
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PerimeterVaue
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Professional mathematical optimization tools designed specifically for solving isometric problems. This application adopts the variational algorithm, which can accurately calculate the optimal shape with the maximum area under a given circumference. Users only need to input the circumference value to quickly obtain the theoretical optimal solution of a circle. Multi unit support: supports free conversion of multiple length units such as meters, centimeters, millimeters, inches, and feet Constrained optimization: capable of handling variational problems with constraints, such as rectangular optimization with fixed aspect ratio or fixed width Visual display: Provides intuitive shape drawing function, supports single shape viewing and multi shape comparison mode, etc
GralvynHalcyoxGrid
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An innovative card merging puzzle! On a 4x4 grid, tap two cards of the same rank to upgrade them. Simple, strategic, and luck-driven. Features smart card generation, local score records, and smooth animations. Play anytime offline—challenge yourself and reach for the King!
Screenshots
Verdict
PerimeterVaue and GralvynHalcyoxGrid are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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.
| Parameter | PerimeterVaue | GralvynHalcyoxGrid |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 — better | 15 |
| Further details — not scored | ||
| Size | 3 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Dhadhu Vakil | Le Hinh Ngoc |
In-app purchases
PerimeterVaue
No in-app purchases
GralvynHalcyoxGrid
No in-app purchases
Questions
Is PerimeterVaue free?
Is GralvynHalcyoxGrid free?
Do PerimeterVaue or GralvynHalcyoxGrid have ads?
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