Aptitude Lease Accounting Engine vs Ledgerage

Aptitude Lease Accounting Engine has no write-up on Specifiction yet; its figures are above.

Ledgerage calculates lease present value, right-of-use assets, lease liabilities, amortization schedules, journal entries and disclosures. Its computations cover ASC 842, IFRS 16 and GASB 87. The web calculator is available without an account and is described as free forever, not as a trial. The Free plan includes unlimited single-lease calculations, two saved leases, 25 API computations per month, 10 API requests per minute and MCP access. Its REST API accepts JSON requests and can return calculations, schedules, journal entries or classifications with citations to the applicable standard. The MCP server offers four tools and names Claude Desktop and Claude Code as compatible clients. Pro costs $39 a month, billed month-to-month with no contract. It includes an unlimited lease portfolio, up to 1,000 saved leases, 5,000 API computations per month, 120 API requests per minute, Excel, CSV and PDF exports, lease modifications and remeasurements, and a hosted MCP server. Ledgerage describes its engine as deterministic, with standard citations and schedules that reconcile to zero at term end. It says results depend on user-provided inputs and judgments and are not accounting or legal advice.