Simple by design
Useful apps that do one job well. Free to use, with no accounts, no adverts and no tracking.
All four calculators in one Android app, or use the standalone web tools below.
Take-home pay, stamp duty, mortgages and bill splitting in one launcher. It reuses the same calculators shown below rather than maintaining separate copies.
Estimate net pay with PAYE tax codes, National Insurance, three pension-relief methods and student loans. Includes annual bonus scenarios, saved local scenarios, salary comparison, pro-rata and statutory pay for 2025/26 and 2026/27, including Scottish tax.
Calculate SDLT in England and Northern Ireland, LBTT in Scotland, or LTT in Wales. Covers first-time buyers, additional properties and the SDLT non-UK resident surcharge.
See required and planned payments, total interest and LTV. Compare repayment with interest-only, include fees, stress-test rates, and explore overpayments with a yearly schedule.
Split every penny exactly, whether service is already included or added as a tip. Supports unequal weighted shares, practical rounding and a copyable payment summary.
Finance results are estimates for planning and are not financial advice, quotes or payslip-exact calculations. Check current rules and provider terms before acting.
Android network diagnostics
Eight focused tools for checking connectivity and understanding what your device can reach: live ICMP ping, latency, DNS over HTTPS, public and local IP details, experimental route tracing, TCP port scans, IPv4 subnet maths and RDAP domain information.
This app collection uses no external fonts or scripts and explains where estimates or third-party network services are involved. Its source repository is currently private.
