Flet vs Apollon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flet
This app allows developers to instantly preview and test their Python-based Flet applications on iOS devices. It connects to local or hosted Flet apps, enabling real-time UI updates without the need for rebuilding or publishing. This streamlines the development workflow for creating cross-platform applications.
- Real-time preview on iOS
- Test local or hosted apps
- Instant UI updates
- Single Python codebase
- Cross-platform development
Read full descriptionHide full description
Flet is an open-source, Python-first framework for building modern applications that run on web, desktop, and mobile devices — all from a single Python codebase. With the Flet mobile app, you can preview and test your Flet projects on iOS by entering a URL to your Flet app running locally or hosted online. Your app is rendered instantly as a native, interactive mobile experience, making iteration fast and easy. Features: • Real-time preview of Flet apps on iOS • Works with local development servers or internet-hosted Flet apps • No need to rebuild or publish to see UI changes Helpful links: • Getting started with mobile testing: https://docs.flet.dev/getting-started/testing-on-mobile/ • Project website: https://flet.dev • Source code: https://github.com/flet-dev/flet
Apollon
Create UML and software design diagrams on your iPhone and iPad. Supports 13 notations, templates, and offline work. Export to various formats or share for collaboration.
- 13 diagram notations
- Templates and blank canvas
- Touch-friendly interface
- Offline diagram creation
- Export to SVG, PNG, PDF, PPTX, JSON
- Share for collaboration
Read full descriptionHide full description
Create UML and software-design diagrams with Apollon, the open-source editor for the web—now ready for iPhone and iPad. Apollon helps students, educators, software engineers, and architects turn ideas into clear, structured models. Start without an account, keep local diagrams on your device, and work offline. When you are ready, export your diagram or share it for feedback and live collaboration. What you can do: • Choose from 13 notations: Class, Object, Activity, Use Case, Communication, Component, Deployment, Petri Net, Reachability Graph, Syntax Tree, Flowchart, BPMN, and SFC. • Start with a blank canvas or a software-design pattern template. • Edit with a touch-friendly interface designed for iPhone and iPad. • Export to SVG, PNG, PDF, PPTX, or JSON. • Use light or dark appearance in portrait or landscape. • Create an optional share link; diagrams you keep local remain local. Apollon uses the same open diagram format across the web app, iPhone and iPad, VS Code, and embedded products. The project is open source and developed by TUM Applied Education Technologies.
Screenshots
Verdict
The clearest difference is review sentiment: Flet at 88% against Apollon's 0%. Flet also leads on rating (4.8 vs 3.0) and update cadence (every 6 weeks vs every 15 months). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Flet holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Flet has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 88% of Flet's written reviews are positive against 0% of Apollon's.
Flet ships an update every 6 weeks, Apollon every 15 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | Flet | Apollon |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (10 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 87.5% of reviews — better | 0.0% of reviews |
| Number of ratings | 10 — better | 2 |
| Update frequency | Every 6 weeks — better | Every 15 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 203 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Appveyor Systems Inc. | TUM Applied Education Technologies |
Customer experience
Flet
Apollon
In-app purchases
Flet
No in-app purchases
Apollon
No in-app purchases









