Pricing

Simple, transparent pricing. You can also use Promethic free with your own API key.

Free
$0
$3.00 introductory spend included
  • 14-day trial of cloud sync
  • Bring your own API key after included spend
  • Local prompt and records storage
Standard
$10 /month
$10.00 monthly spend
  • All features
  • All models
  • Cloud sync
  • Add your own API key for extra usage
  • Cancel anytime
Best Value
Pro
$50 /month
$100.00 monthly spend
  • Everything in Standard
  • $100 monthly included spend
  • Add your own API key for extra usage
  • Cancel anytime

Download once, then choose your plan inside the app.

Download Promethic

What your support makes possible

If you're already creating with Promethic, thank you for supporting us. If you're looking around, we hope we get to create together.

Promethic is built by Soulware Studio, a small team working on bringing great creative tools into the world. Your subscription makes that possible. It lets us devote our full energy to building for you, and it creates a partnership we value deeply. We believe the relationship between a company and its customers is one that should build each other up.

Our goal is to build the best tools so you can express your creativity, and accomplish things you previously thought were impossible. Let's keep building toward a more beautiful future, together. Every feature we ship, every bug we fix, is your investment coming to life. Thank you.

Frequently Asked Questions

What is BYOK (Bring Your Own Key)?
You can add your own provider API key in Settings → API Keys. Use it to supplement your plan's included credits, or on its own without a subscription. Subscribers can also set Promethic to switch to their key automatically when credits run out. Learn more →
Why does cloud sync require a subscription?
Syncing your prompts across devices requires servers, databases, and infrastructure that cost us money to run. Subscriptions cover that cost. Everything else in Promethic works locally and is free with BYOK.
What happens when my trial ends?
You can subscribe to Standard or Pro, or continue free by adding your own API key.
What counts as spend?
Spend is the actual cost of AI model usage — tokens for text models and per-image pricing for image generation. Promethic passes through OpenAI's pricing with no markup. Your spend is tracked in real-time in Settings.
What happens when I reach my spend limit?
You'll see a notification and won't be able to run new conversions until your limit resets at the start of your next billing period. You can upgrade to a higher tier, or add your own API key to keep working.
What models are available?
All plans include access to GPT-5, GPT-5 mini, GPT-5 nano, GPT-5 Pro, GPT-5.1, GPT-5.1 Codex, GPT-5.2, GPT-5.2 Pro, and GPT-Image-1.5 for image generation. More models (Claude, Grok, Gemini) are on the roadmap.
How do I subscribe?
Download Promethic and open Settings → Account. Choose your plan and complete checkout through Stripe's secure payment page.