Promptkoi

Modern Fitness App Icon

Flux
By Varun Sharma Tested with Flux Flux.1 dev

Modern Fitness App Icon is a tested Flux Flux.1 dev prompt for app icons work. It runs at Flux Flux.1 dev · Aspect ratio 1:1 · Steps 28 · CFG scale 3.5, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.

Last tested: July 2026 with Flux Flux.1 dev

Part of the Flux prompt library.

Modern fitness app icon with stylized bicep in purple-to-blue rounded square on white
Modern Fitness App Icon — Flux Flux.1 dev, Aspect ratio 1:1

Prompt 

A modern fitness app icon, stylized flexed bicep inside a rounded square, gradient from deep purple to electric blue, flat minimal vector, subtle muscle detail, no text, no letters, no gradients on the symbol, clean mobile app logo on white background

Settings

Model
Flux Flux.1 dev
Aspect ratio
1:1
Steps
28
CFG scale
3.5

How to use this prompt

App icons must read at 60 pixels, so the symbol needs one clear silhouette. A flexed bicep is instantly recognizable; adding too much muscle detail turns it into a noise blob on a phone. The rounded square gives it app-store framing, and a two-color gradient adds energy without competing with the symbol.

Variations to try

  • Yoga app icon — serene seated figure in lotus pose in sage green
  • Running app icon — dynamic stride mark in sunrise orange gradient
modern minimalist app icons branding

Explore collections

Minimalist Flux Prompts Minimalist Branding Prompts Minimalist App Icons Prompts

What to do next

Explore more →

Browse the full Flux prompt library — every entry tested with its settings.
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For developers — copy this prompt as JSON 
{
  "title": "Modern Fitness App Icon",
  "prompt": "A modern fitness app icon, stylized flexed bicep inside a rounded square, gradient from deep purple to electric blue, flat minimal vector, subtle muscle detail, no text, no letters, no gradients on the symbol, clean mobile app logo on white background",
  "model": "Flux",
  "model_version": "Flux.1 dev",
  "settings": {
    "aspect_ratio": "1:1",
    "steps": 28,
    "cfg": 3.5
  },
  "style_tags": [
    "modern",
    "minimalist"
  ],
  "use_case_tags": [
    "app-icons",
    "branding"
  ],
  "source_url": "https://promptkoi.com/prompts/flux/modern-fitness-app-icon/"
}

The whole library is available as an open JSON dataset · developer docs.