Over 560 examples with explanations: Python and SQL. Over 310 of them are free, and code runs right in the app with the output shown underneath.
An everyday Python reference, from strings and collections to threading and design patterns. Every example comes with an explanation, and most of them run.
The construct is on the tip of your tongue, but the exact syntax slips away:
• How do you sort a dictionary by value?
• How do you serialize a class to JSON and read it back?
• How do you start a thread and wait for the result?
The app answers with a working example; all that is left is to fit it to your task.
• 22 sections: basic types, arrays and collections, classes, files, serialization, functions and lambdas, exceptions, regular expressions, threading, databases, algorithms, design patterns.
• Run in the app: the example actually runs and the output appears under the code. Needs an internet connection.
• What changed in new versions: 8 sections from Python 3.0 to 3.13, with the old and the new code side by side.
• Keyword and function reference: over 200 articles, open in full, with no daily limit.
• SQL alongside: over 200 queries against a live practice database (JOIN, GROUP BY, subqueries, data types).
• Edit examples and add your own; they stay in the app and are always at hand.
• Search looks inside the code itself, not just the titles: remember a fragment and you will find the example.
• Everything except running works offline. No account needed.
WHAT THE FREE VERSION INCLUDES
12 runs and 12 edits a day; the counter resets every morning. The keyword reference is open without limits. Up to 5 examples of your own.
The full version unlocks every example, lifts the daily limits and raises the run limit to 30 a day. One purchase, no subscription.
Built by a developer for developers. In active development since 2015.
I just started learning Python, and this app has proven to be absolutely invaluable. The only thing I would suggest is to possibly use dropdowns or accordion style links for the subsections in the sidebar instead of multiple slides. Thank you!
Developer Response
Thanks for your feedback! The idea is good. I'll try to implement it.
Handy practice when offline
AprilCitro
Would love to see more updates. Also perhaps offer extra features for another one-time charge :)
Developer Response
Thanks for your feedback! Once you purchase the full version, there will be no further additional purchases. The full version activates all functions.
Great app!
Oglopfoosbottom
Incredible app! If someone already knew about programming paradigms and wanted to learn python, this would be my first recommendation I would give. The dev was quick to help me out with fixing a sync problem across my devices too. Highly recommend!
Developer Response
Thanks for your feedback 🖐On the purchases tab there is a "Restore In-App Purchases" button that should restore the purchases you have made to other devices.
Chock full of Information
Johnny Toledo
Not only does this app go through the basic as and advanced parts of JavaScript, but it has DESIGN PATTERNS. I have never, evert seen an app go into design patterns, with diagrams. Bravo my friend.
Developer Response
Thank you very much for your feedback 🤝 About 10 years ago, I was very impressed with the book on design patterns. Therefore, it was interesting to implement them in every programming language.
• Copying code is open in the free version too, with no limit.
• Supports iOS 17 and macOS 14.
Version 4.07
The developer, Fedor Obraztsov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
