The Crypto Calculator Pack is a single offline HTML file packed with four professional calculators, built for investors who want fast, reliable answers without handing their data to a cloud service.
What’s inside
🧾 Cryptocurrency Tax Calculator
Estimate capital gains and tax on your crypto sales. Supports short-term and long-term holding, four US filing statuses, and US/UK/Germany rules — right on your device.
📈 DCA vs Lump Sum Backtest
Compare dollar-cost averaging against a one-time lump-sum investment over any period, with a clear view of how regular investing smooths volatility.
🥩 Staking Rewards Calculator
Project your passive income with simple or compound interest. See exactly how compounding grows your rewards over years.
🪂 Airdrop Eligibility Checker
Paste any EVM wallet address to validate its format and check it against 11+ major airdrop programs — fully offline, fully private.
Why buy the Premium Pack?
- 100% offline — your data never leaves your device. No accounts, no tracking, no cloud.
- One-time payment — own it forever, no subscription.
- Clean, ad-free — no banners, no upsells, no distraction.
- Instant download — get the file immediately after checkout.
- Works anywhere — open it in any browser on any device.
Frequently asked questions
Is this the same as your free tools?
The free tools on this site are great for quick checks. The Premium Pack bundles four of the most powerful calculators into one offline file, with no internet connection required and no limits.
Do I need an internet connection?
No. The file runs entirely in your browser offline. Once downloaded, you can use it anywhere.
How do I get the file after buying?
Immediately after checkout you’ll get a download link in your order confirmation and your account.
Is there a refund policy?
Since this is a digital download, all sales are final. If the file doesn’t work as described, contact us and we’ll make it right.