Summ, formerly Crypto Tax Calculator, is a web and Android service that imports crypto activity from supported wallets, exchanges and files, then organizes transactions for portfolio tracking, cost-basis review and country-specific tax reports. It does not trade or move funds; its supported connections are designed for read-only data access.
What it covers
Depending on the integration, data can be added with a public wallet address, a read-only exchange connection, OAuth or a file. Summ can classify supported trades, transfers, DeFi activity, NFTs and staking records, while its portfolio view tracks holdings and gains or losses. Available tax reports and export formats depend on the account country and plan.
The listed blockchains describe supported data imports, not networks on which Summ executes transactions. Bitcoin, Ethereum, Solana, Base and Arbitrum each have a current official integration page or listing, but coverage can still vary by source and transaction type.
Fit and requirements
Useful for: individuals who need to consolidate crypto records from several accounts, review cost basis and prepare reports for a supported jurisdiction.
Less suited for: users looking for trade execution, automatic filing in every country, or calculations that never require manual reconciliation.
Account required: yes.
Wallet required: no. A public address is needed only when importing activity from that wallet; no wallet signature or private key is required for that import.
Installation: none for the web app; the Android app is optional.
Access, pricing and limits
A free account can import and categorize activity and use portfolio tracking. Generating downloadable tax reports requires an active paid subscription. On the current personal pricing page, annual plans start at $49 for up to 100 total historical transactions; higher tiers cover 1,000, 10,000 or 100,000 transactions. Prices and report availability can differ by country.
Imported records still need review. Missing prices, missing purchase history, unsupported records and unmatched transfers can change cost-basis or tax calculations until they are corrected.