Now Available · Android APK

Calcify

The complete math toolkit built for students, engineers & curious minds. Every tool you need — in one elegant app.

Get Calcify — $0.99 Offline
✦ One-Time Payment
✦ No Subscription Ever
✦ No Ads
✦ Works 100% Offline
✦ Instant APK Delivery

What's Inside

Everything math.
Nothing else.

From basic arithmetic to matrix operations — Calcify replaces 6+ apps with one fast, offline-capable tool.

🧮
Scientific Calculator
Full expression input with sin, cos, tan, log, ln, √, π and full bracket support. Evaluate complex expressions in one go.
📐
Equation Solver
Solve linear, quadratic and simultaneous equations instantly. Shows discriminant, roots, and step classification.
📊
Statistics Engine
Enter any dataset — get mean, median, mode, range, variance, standard deviation, min and max in one tap.
🔢
Matrix Calculator
2×2 and 3×3 matrix operations: determinant, transpose, addition and multiplication with instant results.
📏
Geometry & Mensuration
Area and perimeter for 6+ shapes. Volume and surface area for sphere, cylinder, cone, cube, cuboid.
🔣
Number Tools
Fraction calculator, simplifier, LCM/GCF, percentage calculator, prime checker, and base converter (Binary, Hex, Octal).

App Preview

See it in action

Scientific Calculator

Scientific Calculator

Statistics

Statistics Analysis

Equation Solver

Equation Solver

Geometry

Geometry Tools

Transparency

Why is this an APK
and not on the Play Store?

Fair question — here's the full picture, no spin.

Calcify is an independently developed app built by a solo developer. Publishing on the Google Play Store requires a one-time $25 developer registration fee, a mandatory 14-day closed testing period with a minimum of 12 testers, and a review process that can take weeks. To get Calcify into your hands right now — without the wait — it's being distributed as a direct APK. This is the same way millions of apps are shared before Play Store launch. The purchase is processed securely through Gumroad, a trusted global payment platform used by thousands of independent creators.

01
Gumroad handles payment securely. Your card details are never seen by the developer — Gumroad is used by 100,000+ creators worldwide.
02
The APK is self-contained. It requires no special permissions — no contacts, no camera, no location. Just math tools.
03
You can verify it yourself. Before installing, Android lets you review all permissions the app requests — Calcify requests none.
04
Play Store launch is planned. Revenue from APK sales directly funds the $25 developer account fee to get Calcify on the Play Store officially.

Installation

Install in 3 steps

It takes under a minute. Android makes it easy to install APK files safely.

1

Purchase & Download

Click the Get Calcify button, complete the $0.99 payment on Gumroad. You'll receive a secure download link for the Calcify.apk file instantly via email.

2

Allow "Install Unknown Apps"

On your Android device, go to Settings → Security (or Settings → Apps → Special Access) and enable Install Unknown Apps for your file manager or browser. This is a standard Android setting — you can turn it off again afterwards.

3

Open & Install

Tap the downloaded Calcify.apk file, press Install, and you're done. The app opens immediately — no account, no setup, no internet needed.

Pricing

Simple, fair pricing.

Lifetime Access
$0.99

One-time · No subscription · No renewals

✓ All 6 tool categories included
✓ 100% offline — no internet needed
✓ No ads, ever
✓ Instant APK download via email
✓ Future updates included
✓ Secure payment via Gumroad
Download Calcify — $0.99

Processed securely by Gumroad · Android only