Comparison

OrbitCalc vs RISC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OrbitCalc

This tool helps space enthusiasts, engineers, and researchers precisely calculate satellite orbits. It allows users to determine orbital parameters from vector data or vice versa with accurate results. Save and manage your calculations, and customize measurement units for a personalized experience.

Highlights
  • Orbital calculations from parameters or vectors
  • Save and revisit previous calculations
  • History page for managing saved work
  • Customizable measurement units
Features
Read full description

OrbitCalc – Satellite Orbit Calculator OrbitCalc is a powerful and intuitive tool designed for space enthusiasts, engineers, and researchers to calculate satellite orbits with precision. Whether you need to determine orbital parameters from vectors or vice versa, OrbitCalc provides accurate results in just a few taps. Key Features: • Orbital Calculations – Compute satellite orbits based on orbital parameters or vector data effortlessly. • Save Your Calculations – Keep track of your work and revisit previous calculations anytime. • History Page – View and manage all your saved calculations in one place. • Customizable Measurement Units – Adjust unit preferences to suit your needs. Whether you're a student, researcher, or space professional, OrbitCalc is your go-to app for orbital mechanics calculations. Download OrbitCalc today and explore the universe with precision!

About

RISC

Simulate a complete 32-bit mobile system, including CPU units and memory. Write and debug assembly code directly on the simulated hardware to understand its inner workings.

Highlights
  • 32-bit system simulation
  • CPU unit simulation
  • Memory subsystem simulation
  • Native assembly coding
  • Built-in debugger
  • Hardware analysis
Features
Read full description

RISC-V Assembly Simulator is a mobile 32-bit system simulator. The app simulates the entire system, all the way from each individual unit on a CPU to the memory subsystem. Write assembly natively to the CPU, with a built-in debugger so you can analyze your code and see what the hardware is doing. This app is designed to allow you to learn how to write assembly from your mobile device, simulating a real CPU at your devices maximum speed. Visualize how the hardware works if you want to, see all the registers, see your entire memory subsystem for each cycle. Learn the components of this individual CPU. This app currently supports the base Int for RV32 along with the M extension, allowing multiplication and division. Dual core systems are supported with the atomic instructions. This app features a built in assembler to allow you to learn to write code along with descriptive errors. Code along with Apple Intelligence, giving you advice and helping you fix bugs along the way (experimental). Natively integrated with your devices file system, allowing seamless transfer between devices and potentially other sources.

Screenshots

OrbitCalc4 screens
RISC4 screens

Verdict

The call

The clearest difference is in-app purchases: RISC at none against OrbitCalc's 1. OrbitCalc's advantage is iOS requirement (18.0 vs 26.0). On price, rating, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OrbitCalc sells 1 one-off in-app purchase. RISC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for OrbitCalc against 5.0 for RISC. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Scorecard2 real differences · 8 level
OrbitCalc versus RISC: the parameters behind the verdict, then further details
ParameterOrbitCalcRISC
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings11
Update frequency—Every 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhoneiPhone, iPad — better
Requires iOS18.0 — better26.0
Further details — not scored
Size11 MB3 MB
Age rating4+4+
DeveloperBian Dhoan KwikMatthew Jacobs

Customer experience

OrbitCalc

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

RISC

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

OrbitCalc

One-time1
  • OrbitCalc Pro$0.99
None

RISC

No in-app purchases

Questions

Is OrbitCalc free?
OrbitCalc is free to download, with in-app purchases available.
Is RISC free?
RISC is free to download, with no in-app purchases.
Which has better reviews, OrbitCalc or RISC?
OrbitCalc and RISC are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do OrbitCalc or RISC have ads?
Neither OrbitCalc nor RISC shows ads.

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