Free tools for AI builders and crypto users.
Calculators, countdowns, and live data widgets. No signup, no ads, no upsells. Bookmark them, share them, embed them. Built because we needed them ourselves.
AI
AI API Cost Calculator
Compare monthly spend across Claude 4.6, GPT-5, Gemini 2.5, Llama 4, and DeepSeek V3.5. Includes prompt caching savings.
DeFi
Impermanent Loss Calculator
Estimate IL for any 50/50 AMM liquidity pool. Compare HODL vs LP returns side-by-side.
Crypto
Bitcoin Halving Countdown
Live countdown to the next Bitcoin halving (block 1,050,000) with real-time chain tip.
More tools coming soon
Crypto tax estimator · MEV gas tracker · DeFi risk scorer · AI prompt token counter