Free learning in the browser. Free native TestFlight testing by invitation. The planned public app price is US$9.99, paid once.
No account or payment card required.
Learn, look something up or try an idea in a browser. The public website is open to everyone.
TestFlight invitation required · iOS 18 or later
There is no charge for the current native preview. The app is being tested before a public release, with access through Apple’s TestFlight app.
US$14.99 planned regular price
One-time app purchase · initial public price
For the future public iPhone and iPad app. Public release is pending; the app is not on sale or available to pre-order here.
The planned US App Store launch price is $9.99, paid once. A public release date has not been announced. The website remains free, and the current native TestFlight preview is free by invitation.
The initial US$9.99 price has no scheduled end date and remains until a manual change. US$14.99 is the planned regular price, not a previous selling price. When the app becomes publicly available, the App Store will show the final price and currency for your region before purchase. This website has no current purchase, subscription or pre-order offer, and it does not collect payment details.
| Capability | iPhone & iPad app | Website & playground |
|---|---|---|
| Appearance | Light, Dark or Auto in Settings → Appearance | Light, Dark or Auto from the page header; saved in this browser |
| The .NET journal | Eight complete articles and illustrations bundled for offline reading | Eight free articles, with three downloadable .NET 10 experiments |
| Where you use it | Native app on iPhone and iPad, iOS 18 or later | A recent desktop or mobile browser with WebAssembly |
| Lessons and references | Bundled learning material works offline | Public reading pages; internet access is needed to load them |
| Running C# | Roslyn and .NET 9 WebAssembly run on the device | Roslyn and .NET 9 WebAssembly run in a browser worker |
| Source debugging | Native TestFlight preview: breakpoints, stepping, locals and call stack | Run and compiler diagnostics; no source stepping |
| Project storage | Local projects, folders and multiple source files | Temporary editor session; download all source as a ZIP |
| Learning progress | Saved in the app on this device | Saved in this browser; it does not sync with the app |
| Prepared input | Supply Console.ReadLine() values before a run | Supply Console.ReadLine() values before a run |
| Sharing | Optional temporary encrypted rooms and project export | Open a shared-room snapshot or download a local project |
| Access | Free TestFlight preview by invitation; planned public launch US$9.99 one-time | Free to use without an account |
Yes. Choose Light, Dark or Auto in the website header. Auto follows your device appearance, including changes while the page is open. Your choice carries across the academy, journal, playground and Memory Lab and is saved in this browser. In the native app, use Settings → Appearance; the offline journal and Memory Lab follow the same app setting.
Yes. The public academy, knowledge library, example projects, journal and browser playground are free to use. No SharpRune account or payment card is required.
The planned public App Store launch price is US$9.99 as a one-time app purchase. The public website and current invitation-only TestFlight preview are free. No purchase, subscription or pre-order is available on this website. Regional App Store pricing will be shown before a future purchase; beta access does not grant a future paid-app entitlement.
The native app includes its compiler, runtime and bundled lessons, so these work offline after installation. The public website needs a connection to load pages and the browser toolchain. A normal browser Run uses the runtime already loaded into that session.
SharpRune targets a .NET 9 WebAssembly learning profile. Small managed console programs, language experiments, LINQ and data-processing examples are a good fit. Desktop operating-system processes, arbitrary native libraries and production server hosting need a different environment. The public playground does not restore arbitrary NuGet packages.