# Apexline: Rocket Simulator — Model flight, mass and drag

> Model flight, mass and drag (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/apexline-rocket-simulator/id6777868815 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Utilities, Education
- Price: $3.99
- Age rating: 4+
- Requires: iOS 17.0 · 50 MB
- Languages: American English
- Released: 2026-06-13
- Data updated: 2026-10-13

## What is Apexline?

Explore how changes in empty mass and drag affect the modeled flight of the same rocket and motor.

HOW IT WORKS
1. Configure a rocket, motor and conditions in Altitude.
2. Open Flight Envelope and choose mass and drag variations.
3. Run the sensitivity check, inspect the scenarios and share the report.

Motor references, stability, recovery and flight logs remain available. The mission readiness board now opens from Altitude without covering the app tabs.

WHAT TO KNOW
This is a model sensitivity study, not a probability interval or permission to launch. Only empty mass and drag vary. Wind, motor variation, instability and other conditions can produce results outside the displayed range. Scenario inputs are a snapshot; return to Altitude to change the baseline.

iPhone and iPad.

## Is Apexline safe?

Not enough ratings yet to assess Apexline.

## Is Apexline legit?

Apexline: Rocket Simulator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Apexline is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 3.0.1 — 2026-09-30

A clearer App Store name and search details. No other changes in this update.

### 3.0 — 2026-09-15

Flight Envelope

Explore how changes in empty mass and drag affect the modeled flight of the same rocket and motor.

1. Configure a rocket, motor and conditions in Altitude.
2. Open Flight Envelope and choose mass and drag variations.
3. Run the sensitivity check, inspect the scenarios and share the report.

This is a model sensitivity study, not a probability interval or permission to launch. Only empty mass and drag vary. Wind, motor variation, instability and other conditions can produce results outside the displayed range. Scenario inputs are a snapshot; return to Altitude to change the baseline.

### 2.2 — 2026-07-02

New Two-Stage & Cluster Planner: simulate a booster + sustainer flight or a multi-motor cluster - staging altitude and speed, total apogee, and the right sustainer delay to fly. New Flight Duration Planner predicts your total flight time from liftoff to landing and sizes the chute to hit a contest duration window. Plus, share any rocket design as a file and import designs from teammates - perfect for clubs and student teams, no account needed.

### 2.1 — 2026-06-28

Version 2.1

• New Launch Readiness Card: combines altitude simulation, ejection delay, rod-exit speed, Barrowman stability, recovery drift, wind, and field size into a single go/caution/hold field checklist.

• New Offline Field Card Deck: bundled launch-day reference cards for common model-rocketry checks, designed to work when the field has no signal.

• Fixed the shared New Rocket action in Altitude, Stability, and Recovery. It is now a full-width command row with an immediate visible draft rocket, reset fields, and confirmation on iPad.

• Refreshed App Store screenshots and metadata to show the current 2.1 interface and tools.

Estimates assume near-vertical flight and approximate published specs — always confirm against the certified data on the motor and follow the safety code.

### 2.0.1 — 2026-06-23

This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, so every screen reads as a clean column. iPhone is unchanged; still fully on-device.

## Apps similar to Apexline

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| [PhotoFlic](https://appshunter.io/ios/app/photoflic/id6757321969) | — | $4.99 | Utilities |

## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text: Encryption](https://appshunter.io/ios/app/hush-secret-text-encryption/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF: Expense Report](https://appshunter.io/ios/app/receipt-to-pdf-expense-report/id6761782025)
- [Route Your Pay: Mileage Log](https://appshunter.io/ios/app/route-your-pay-mileage-log/id6761783719)
- [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879)

All apps by Robert Corbin: https://appshunter.io/developer/1890247992

## Related topics

[rocket simulator](https://appshunter.io/ios/topics/rocket-simulator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-13.*