Lifetime access. No subscription.
Pay once, own it forever. Every tier includes future updates and improvements.
- All 9 queuing models (M/M/1, M/M/c, M/G/1, …)
- EOQ and Newsvendor inventory models
- Monte Carlo simulation
- Linear programming + CPM scheduling
- 5 AI explanations per day
- No exports
- Standard rate limit
Use Free
Most popular
- Everything in Free
- Excel exports (queuing, inventory, LP)
- PDF reports with charts and notes
- Unlimited AI explanations
- All advanced inventory models (EOQ-backorder, EPQ, ROP, base-stock)
- Higher rate limit (100 req/min)
- Lifetime updates
Buy Pro — $49
License key emailed instantly after checkout.
- Everything in Pro
- Branded PDF reports (your logo + footer)
- API access with token authentication
- Commercial-use license
- Up to 5 seats — share the key with your team
- Priority email support
- Lifetime updates
Buy Team — $249
License key emailed instantly after checkout.
FAQ
Is this really lifetime?
Yes. Pay once, use it forever. All future updates included.
What if my browser clears storage?
Your license key was emailed to you — just paste it on the
Account page again. You can re-activate as many times as needed.
Can I use Pro on multiple computers?
Yes. The key is yours — use it on every machine and browser you own.
Do you offer refunds?
Yes. Email us within 14 days and we'll refund, no questions asked.
Do I have to log in?
No login. After purchase you'll get a license key by email — paste it once and you're done.