FinCalc 💶  stands for 'Financial Calculator' 🧮
Start of an app project on  financial mathematical issues :
• Modules:  Amortization Loans  (new) and  Annuity Loans :
Determination of  Disagio  - /  Agio  amount and in% as well as
 mutual  calculation 🔄 of  remaining debt ,  installment  and  loan interest .
4 interest rates  30  /  360 ,  act  /  act ,  act  /  365  and  act  /  360  available!
Finely adjustable account management parameters 📝 such as:
Amount and date of the 1st installment, interest and repayment offsetting, etc ...
 FinCalc  💶 calculations under freely selectable file names
Save 💾 and Load 📂 (also available as a text file)
 Day-specific repayment plan  📊, as well as  parts of the repayment plan  as an html file for viewing in a web browser and in CSV format for spreadsheets such as EXCEL / LibreCalc etc ...
• Interest days: date calculations according to various interest rates
• further computing modules with
 Interest  and  capital calculations  for various banking products are in preparation ... 📄📐
Flexible date entry:
• Valid separators for date are:. , - and spaces
• Invalid letters and special characters are ignored 🚫
• Missing date components (month and / or year) are supplemented by corresponding parts of today's date 📆✏️
• Day greater than month's end of day is replaced by day for month of end of day
• 📅 Date range: 1/1/1600 to 12/31/9999 (Gregorian calendar)
• Reset✂️ the internal FinCalc💶 data
  (useful for problems after entering inconsistent data)