Apps by Keiji Matsui
Gompertz curve Calculator app icon

Utilities

Gompertz curve Calculator

Keiji Matsui

Free download In-app purchases unconfirmed
Open on Apple

About this app

A strong tool for software testing. Gompertz curve calculator can calculates Gompertz curve from 3-point times (t0, t1, t2) and values (A, B, C). Asymptote means the maximum or minimum value. When you enter an arbitrary time (tx), you know the value at tx (F(tx)). Gompertz model is representative of all biological growth (e.g. tumor growth). It is also used for software reliability growth model.

Latest release

What’s New

Version 3.2 Jan 2, 2022

added the privacy policy

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
0 ratings
0 Aug 12, 2026 · 0 ratings Aug 12, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 12, 2026 · Free Aug 12, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 12, 2026 · 5:16 PM Free

Screenshots

Gompertz curve Calculator iPhone screenshot Gompertz curve Calculator iPad screenshot