What's new
New tools and expansions of existing ones. Keyboard, focus and small visual fixes stay in the code, not on this list.
0.140.0
The effective APR calculator now has field hints for the nominal rate and compounding frequency per year.
0.139.0
The rule of 72 calculator now has a field hint explaining the yearly rate and the 72 ÷ rate shortcut.
0.138.0
The real raise calculator now has field hints for salary, raise percent and inflation.
0.137.0
The annuity payment calculator now has field hints for principal, years and yearly rate.
0.136.0
The NPV calculator now has field hints for outlay, yearly cashflow, years and discount rate.
0.135.0
The CAGR calculator now has field hints for start value, end value and years.
0.134.0
The buying-power calculator now has field hints for amount, years, index mode and custom rate.
0.133.0
The compound interest calculator now has field hints for principal, rate, years, compounding and monthly deposits.
0.132.0
The real-return calculator now has field hints for nominal yield and inflation.
0.131.0
The future-price inflation calculator now has field hints for amount, annual rate and years.
0.130.0
The ROI calculator now has field hints for cost, current value and years held.
0.129.0
The rental yield calculator now has field hints for purchase price, rent, vacancy and running costs.
0.128.0
The BMI calculator now has field hints for weight and height.
0.127.0
The mortgage calculator now has field hints for home price, down payment, rate, term and instalment type.
0.126.0
The loan overpayment calculator now has field hints for principal, annual rate, term and extra monthly payment.
0.125.0
Subscriptions catalog: ChatGPT Go/Plus/Pro tiers and Google AI Plus/Pro/Ultra prices updated for PL, USD and EUR.
0.124.0
The simple payback calculator now has field hints for upfront cost and yearly savings or income.
0.123.0
Home and header search now answer simple payback phrases with years to earn back, e.g. “payback”, “prosty zwrot 24000” or “Einfache Amortisation”.
0.122.0
The debt payoff calculator now has field hints for balance, APR and monthly payment.
0.121.0
Home and header search now answer debt-payoff phrases with months to clear, e.g. “debt payoff”, “spłata długu 15000” or “Schulden tilgen”.
0.120.0
The FIRE number calculator now has field hints for yearly spend, withdrawal rate, current savings, yearly deposits and expected real return.
0.119.0
Home and header search now answer JDG Calendar phrases with annual take-home net, e.g. “jdg kalendarz 150”, “jdg calendar” or “JDG Kalender”.
0.118.0
New JDG Calendar calculator: net hourly rate × Polish workdays × 8 h, with ZUS, scale/linear/ryczałt and a monthly or quarterly year breakdown plus a workday chart.
0.117.0
Home and header search now answer FIRE number phrases with a nest-egg target, e.g. “fire number”, “liczba FIRE 60000” or “FIRE-Zahl 4%”.
0.116.0
The PV yield calculator now has field hints for array size, second-plane share and shading loss.
0.115.0
Home and header search now answer PV yield phrases with annual kWh, e.g. “pv yield”, “uzysk fotowoltaiki 10” or “photovoltaik ertrag warschau”.
0.114.0
The savings-rate calculator now has field hints for monthly take-home income and what you set aside each month.
0.113.0
Home and header search now answer savings-rate phrases with a percentage, e.g. “savings rate”, “wskaźnik oszczędności 6000 1200” or “sparquote 25%”.
0.112.0
The subscriptions calculator adds an AI category, more tiers, locale-specific prices and a tier price table with yearly totals and highlighted picks.
0.111.0
The emergency fund calculator now has field hints for monthly essentials, months of cover, cash already saved and monthly deposits.
0.110.0
Home and header search now answer emergency fund phrases with a cash target, e.g. “emergency fund”, “poduszka finansowa 4000” or “notgroschen”.
0.109.0
The PV sizing calculator now has field hints for annual use, cover share, module wattage and optional roof area.
0.108.0
Home and header search now answer PV sizing phrases with a suggested kWp, e.g. “fotowoltaika”, “pv size 10000” or “photovoltaik”.
0.107.0
The heat pump calculator now has field hints for heated area, insulation class, SCOP, gas price and boiler efficiency.
0.106.0
Home and header search now answer heat pump phrases with an annual running cost, e.g. “heat pump”, “pompa ciepła 150” or “Wärmepumpe wt 2021”.
0.105.0
Home and header search now answer subscription phrases with a monthly total, e.g. “subscriptions”, “subskrypcje netflix spotify” or “abos 100”.
0.104.0
Calculator links now use localized URL paths on Polish and German (e.g. /pl/subskrypcje, /de/abos); legacy English slugs redirect permanently.
0.103.0
The subscription calculator now has a catalog of popular services with tiers, brand marks, monthly or yearly billing and category totals.
0.102.0
Home and header search now answer heating-fuel phrases with the cheapest annual cost, e.g. “heating fuel” or “ogrzewanie 20000”.
0.101.0
The public changelog now lists only new tools and expansions of existing ones. The server-copy notice says only the site owner can read it, with a PIN.
0.100.0
Home and header search now answer insulation phrases with an annual heat-loss cost, e.g. “insulation 30”.
0.99.0
Home and header search now answer appliance-cost phrases with an annual total, e.g. “appliance 2000”.
0.98.0
The appliance energy calculator now has field hints for nameplate watts, daily hours and billing days.
0.97.0
Home and header search now answer cooling phrases with watts, e.g. “cooling 40”.
0.96.0
The heat-loss calculator now has field hints for U-value, temperature difference and heating-season hours.
0.95.0
Home and header search now answer water-bill phrases with a total, e.g. “water bill 9”.
0.94.0
The water and sewage bill calculator now has field hints for consumption, water tariff and sewage tariff.
0.93.0
Home and header search now answer hot-water phrases with an annual cost, e.g. “cwu 150”.
0.92.0
The heating fuel comparison calculator now has field hints for annual heat demand, boiler efficiency and heat-pump SCOP.
0.91.0
The cooling-load calculator now has field hints for floor area and watts per square metre, with typical 80–100 W/m² ranges.
0.90.0
The domestic hot water calculator now has field hints for inlet temperature, tap temperature and heater COP.
0.89.0
Home and header search now answer gas-bill phrases with a monthly total, e.g. “gas bill 80”. Gas queries no longer open the electricity bill calculator by mistake.
0.88.0
The gas bill calculator now shows the standing charge separately from energy cost and adds field hints for the calorific factor and monthly fixed fee.
0.87.0
English and German catalogues now hide Poland-specific tools such as G11 tariffs and employment-contract pay. Those calculators stay under Poland’s flag; search still finds them.
0.86.0
The G11 vs G12 calculator now has info icons with field hints for the distributor, peak share and seller energy prices.
0.85.0
The power bill calculator now groups seller energy, DSO distribution and net-billing separately, and adds info icons with hover hints on less obvious fields.
0.84.0
The G11 vs G12 calculator now includes an infographic of weekday peak hours and how your annual use splits between peak and off-peak on G12.
0.83.0
Power bill queries now show the estimated annual bill inline in home and header search, with the tariff used in the estimate.
0.82.0
G11 vs G12 queries now show estimated annual savings inline in home and header search, with a note on which tariff wins.
0.81.0
Contract comparison queries now show the best take-home pay inline in home and header search, with a note on which form wins.
0.80.0
Home search now understands contract comparison phrases and opens the UoP vs zlecenie vs JDG calculator, optionally prefilling monthly gross from your query.
0.79.0
Home search now understands electricity bill phrases and opens the power bill calculator, optionally prefilling yearly use, G11/G12 tariff or peak share.
0.78.0
Home search now understands G11 vs G12 phrases and opens the tariff comparison calculator, optionally prefilling yearly use or peak share from your query.
0.77.0
New G11 vs G12 tariff comparison calculator with distributor presets (PGE, Tauron, Enea, Energa, STOEN), 2025 net distribution rates and a side-by-side yearly bill. Pick your DSO, enter use and seller prices to see which tariff saves more.
0.76.0
Date and time fields now select their value when you focus them, like the number inputs. Tap a drink time in the breathalyzer and you can type over it right away.
0.75.0
The Browse chevron turns when the menu is open, the same way FAQ questions do. Tabbing to Browse shows the header focus ring, so you can tell the control is selected.
0.74.0
Remove on a saved result now names the calculator. You can tell BMI from VAT before you delete a row.
0.73.0
The RiverMath mark in the header looks selected on the home catalog. The same mark in the footer is a home link, so you can get back without hunting for Calculators.
0.72.0
Footer links for history, privacy, cookies, changelog, groups and topics look selected on the page you are on. Screen readers hear the current page in the footer the same way as in the header.
0.71.0
Header search shows how many calculators match what you typed. The list is a combobox, so arrow keys and screen readers stay on the same row.
0.70.0
Group chips on the home catalog highlight the section you are looking at. The sticky bar keeps the current group in view on a narrow screen.
0.69.0
The appearance control in the header shows light, dark or match system next to the icon. You no longer have to hover to see which theme is on.
0.68.0
The version in the footer is a link to that release on the changelog. Each release heading is a permalink, and the sticky header does not cover it.
0.67.0
Browse in the header looks selected on a group or calculator page. Opening it highlights the current group and tool as the current page.
0.66.0
History and About look selected in the header and phone menu when you are on those pages. Group and topic links in the phone menu do the same. Screen readers mark the language chip as the current page.
0.65.0
Topic chips now sit under a heading in the page language. The active topic is marked as the current page.
0.64.0
Number fields no longer show browser stepper arrows. Those controls crowded the unit suffix and fought tap-to-replace.
0.63.0
Header search shows a / key. Pressing it focuses the search you can see, not the hidden copy for the other layout.
0.62.0
Search no longer goes quiet when nothing matches. The dropdown stays open and says that no calculators fit what you typed.