Comparison

Flet vs Apollon

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

Head to head
About

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.

Highlights
  • Real-time preview on iOS
  • Test local or hosted apps
  • Instant UI updates
  • Single Python codebase
  • Cross-platform development
Features
Read 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

About

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.

Highlights
  • 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 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

Flet3 screens
Apollon4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Flet versus Apollon: the parameters behind the verdict, then further details
ParameterFletApollon
PriceFreeFree
Rating4.8 (10 ratings) — better3.0 (2 ratings)
Positive reviews87.5% of reviews — better0.0% of reviews
Number of ratings10 — better2
Update frequencyEvery 6 weeks — betterEvery 15 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size203 MB18 MB
Age rating4+4+
DeveloperAppveyor Systems Inc.TUM Applied Education Technologies

Customer experience

Flet

All ratings9 ratings
Positive88.9%
Neutral11.1%
Negative0.0%
Written reviews8 reviews
Positive87.5%
Neutral12.5%
Negative0.0%

Apollon

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Flet

No in-app purchases

None

Apollon

No in-app purchases

Questions

Is Flet free?
Flet is free to download, with no in-app purchases.
Is Apollon free?
Apollon is free to download, with no in-app purchases.
Which has better reviews, Flet or Apollon?
Flet is rated higher. Flet averages 4.8 out of 5 from 10 ratings, while Apollon averages 3.0 from 2 ratings.
Do Flet or Apollon have ads?
Neither Flet nor Apollon shows ads.
Which is updated more often, Flet or Apollon?
Flet ships an update every 6 weeks, and Apollon every 15 months. Most recently, Flet was updated on November 3, 2026 and Apollon on November 4, 2026.

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