# Rocket Calculator: ApogeeField

> Model Rocketry Flight Sim

Canonical page: [https://chrome-stats.com/d/id6778329350](https://chrome-stats.com/d/id6778329350)

## Overview

- **ID:** `id6778329350`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** 毅 王
- **Category:** Utilities
- **Version:** 1.2
- **Last updated:** 2026-06-27
- **First published:** 2026-06-12
- **Size:** 1.01 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/rocket-calculator-apogeefield/id6778329350)
- **Privacy policy:** [https://ruby-apps-legal.pages.dev/apogeefield/privacy/](https://ruby-apps-legal.pages.dev/apogeefield/privacy/)

## Description

ApogeeField is an offline flight calculator for low and mid-power model rocketry. Enter your rocket (dry mass, body diameter, drag coefficient, launch-guide length) and pick a motor, and it predicts your apogee, the best ejection delay, max velocity, and rail-exit velocity right at the pad — with no signal, no account, and no tracking.

WHAT IT DOES
- Apogee, max velocity and full altitude / velocity / acceleration flight curves — free.
- Recommended ejection delay: ideal coast time mapped to the nearest delay you can actually buy, with the offset in seconds.
- Rail-exit velocity with a configurable safety threshold, so you can judge whether the rocket will leave the rail under control.
- Compare motors side by side and export your flight card and saved rockets.
- Built-in motor database (thrust curves and certified statistics) plus import of your own .eng / .rse files.
- Switch freely between metric and imperial units.

HOW THE MODEL WORKS (and its limits)
ApogeeField runs a deterministic 1-DOF (vertical, point-mass, with launch-angle cosine) flight integration: thrust-curve integration, variable-mass burn (propellant mass is subtracted as impulse is consumed), quadratic drag, and an ISA standard-atmosphere density model, coasting to apogee at the velocity zero-crossing. Every assumption is shown on the results screen so you can line your inputs up against OpenRocket or your own altimeter data.

It is an engineering estimate for hobby use — a starting point, not a guarantee. The model does not account for wind, airframe stability, roll, or weathercocking, so real flights will differ. Always verify with an altimeter. This is not a safety, airworthiness, or legal document, and it does not replace the NAR / Tripoli safety code or local airspace rules — follow them.

PRIVACY & PRICING
100% offline. No account, no network requests, no analytics, no ads. Your rockets and imported motor files stay on your device. One-time unlock — no subscription. Motor data are numerical facts drawn from publicly submitted thrust-curve files and NAR / Tripoli / CAR certification statistics, stored in our own format with the source and database version shown in the app.

## Rankings

- #1,425,236 — Overall

## Similar extensions and apps

- [ApogeeLog: Model Rocketry](https://chrome-stats.com/d/id6775553475)
- [Rocket Recovery](https://chrome-stats.com/d/id1536668373) — 3.10 / 5
- [Rocket Logs](https://chrome-stats.com/d/id6752035826) — 4.00 / 5
- [Rocket Tracker](https://chrome-stats.com/d/id455751461) — 5.00 / 5
- [iPowerRocket](https://chrome-stats.com/d/id301295857) — 3.30 / 5
- [Launch-Mate](https://chrome-stats.com/d/id6755574216) — 5.00 / 5
- [RocketSim](https://chrome-stats.com/d/id6761836011)
- [Rocket Science](https://chrome-stats.com/d/id6621188323) — 5.00 / 5
- [Advanced Ballistics Calculator](https://chrome-stats.com/d/id6783653846) — 5.00 / 5
- [Rocketry - Live Launch Tracker](https://chrome-stats.com/d/id6738462173)
- [PilotCalc Pro](https://chrome-stats.com/d/id6773768107)
- [Gadsden Ballistic Calculator](https://chrome-stats.com/d/id6761585061)

---

Source: [Chrome-Stats](https://chrome-stats.com/d/id6778329350)