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About this app
⚖️ Smart Calculator for Lawyers
Quickly and accurately perform the most frequently used calculations in legal practice! An essential tool for lawyers, judicial scriveners, court staff, and law school students. Easily handle complex legal calculations with an intuitive interface.
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📅 Period Calculation - An Essential Feature for Litigation Practice
Completely supports period calculations, a crucial aspect of litigation practice.
🔹 Forward Calculation (Start Date + Period = End Date)
Use this calculator to calculate the deadline for filing a response from the filing date of a complaint or to calculate the expiration date from the contract start date. Simply enter the start date and the desired period (in days, weeks, months, or years) and the calculator will automatically calculate the exact end date.
🔹 Backward Calculation (End Date - Period = Start Date)
This feature is useful for cases where a backdated period is required. For example, it's useful for calculating the date of a judgment from the deadline for filing an appeal, or calculating the start date of a contract from a specific expiration date. Enter the end date and period, and the start date will be automatically calculated.
🔹 Freedom to Select Period Units
You can display periods in various units to suit your needs:
Days Only (e.g., 45 days)
Weeks + Days (e.g., 6 weeks, 3 days)
Months + Days (e.g., 1 month, 15 days)
Years + Days (e.g., 1 year, 10 days)
Years + Months + Days (e.g., 1 year, 2 months, 5 days)
🔹 Real-Time Period Adjustment
Quickly adjust the number of days with the +/- buttons without opening the date selection screen. With intuitive animations and real-time updates of deadlines, you can quickly compare and review multiple scenarios.
🔹 Holiday and Weekend Notifications
If the calculated end date falls on a weekend or holiday, a notification will automatically appear. This helps practitioners avoid missing deadline extensions under relevant laws, such as the Civil Procedure Act.
🔹 iOS-Style Date Picker
The iOS-style drumroll date picker is also available on Android. You can select it in Settings and customize the interface to your personal preference.
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💰 Interest Calculation - The Core of Monetary Claims
This app provides essential interest calculation features for monetary claims, such as loans, damages, and unjust enrichment.
🔹 Enter Principal and Interest
Principal can be entered up to 12 digits (in trillions), with automatic display of thousands separators for improved readability. Interest rates can be accurately entered up to three decimal places based on the annual interest rate.
🔹 Select Period Calculation Method
Both commonly used interest calculation methods are supported:
Period Calculation Method: Calculate the period using the (end date - start date) method. This is a common period calculation method according to Article 163 of the Civil Act, and the principle of excluding the first day of the month applies.
365-Day Installment Method: Calculate pro rata based on a 365-day year. This method calculates interest based on exactly 365 days per year.
🔹 Real-time Calculation Results
As soon as you enter the principal, interest rate, and term, the following information is calculated and displayed in real time:
Period: Displayed in years and days (e.g., 1 year 45 days)
Interest: Accrued interest amount
Total: Total principal + interest
Calculation Formula: Clear display of the applied calculation formula
🔹 Calculation Formula Display
This feature not only displays the result but also clearly displays the calculation formula used. This is extremely useful when you need to clearly state the basis for the calculation when preparing a court filing.
🔹 Date Management Function
Similar to the period calculation function, this feature provides the ability to reset the start and end dates to today and quickly adjust dates using the +/- buttons. This allows you to quickly compare multiple scenarios.
🔹 Legal Information Guide
This feature provides brief guidance on legal regulations related to interest calculations, helping practitioners quickly check the legal basis.
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👨👩👧👦 Inheritance Calculation - Family Law Practical Support
This is a specialized function that automatically calculates the statutory inheritance share and reserved portion under the Civil Act.
🔹 Enter Inheritance and Contributions
You can enter the total inheritance and the contribution of a specific heir. Contributions are recognized as amounts specifically contributed to the maintenance or increase of the deceased's assets, as stipulated in Article 1008-2 of the Civil Act.
🔹 Heir Configuration
You can enter the exact configuration of an actual inheritance case:
Select whether or not you have a spouse (toggle ON/OFF)
Enter the number of children (easily adjust with the increase/decrease buttons)
Enter the number of direct ascendants (up to 2, enabled only if you have no children)
Enter the number of siblings (enabled if you have neither children nor direct ascendants)
🔹 Automatic Rank Determination
The system automatically determines the order of inheritance according to the Civil Code based on the entered heir configuration. If a lower-ranking heir is excluded from inheritance, the corresponding input field will be automatically disabled.
🔹 Automatic Calculation of Statutory Share
Automatically calculates the statutory share of each heir according to Article 1009 of the Civil Act:
Spouse's share: 1.5 times if jointly inherited with a direct descendant or direct ascendant
Equal shares for children, direct ascendants, and siblings
Adjusted inheritance shares reflecting contributions, if any
🔹 Automatic Calculation of Reserved Share
Automatically calculates the reserved share of each heir according to Articles 1112 and 1113 of the Civil Act. The reserved share is the minimum share of inheritance that cannot be infringed upon by the decedent's will or gift, and is essential information to verify in cases claiming the return of the reserved share.
🔹 Display of Contributor Classification
If a contribution has been entered, the calculation result for that heir is displayed with a blue background for easy identification.
🔹 Displaying Inheritance Rank Information
The current inheritance rank is clearly displayed at the top of the calculation results. (Example: "First-Purpose Inheritance - Children and Spouse", "Second-Purpose Inheritance - Direct Ancestors and Spouse")
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✨ Perfect User Experience
🔹 Intuitive Interface
Designed for ease of use, even for non-legal experts. Each input field has clear icons and colors, and the calculation results are displayed neatly in a structured card format.
🔹 Real-Time Responsive Calculation
The calculation results update in real time as any input value changes. You can view the results seamlessly without having to press a separate calculate button.
🔹 Animation Effect
A smooth flip animation is applied when the numbers change, making the visual changes clearer. This thoughtful detail further enhances the user experience.
🔹 Haptic Feedback
Vibration feedback is provided whenever a button is pressed or a value is changed, allowing you to feel your touch input accurately recognized.
🔹 Toast Notification
A simple guidance message appears at the top of the screen when major actions, such as switching modes or resetting the date, are performed. This provides a clear understanding of the current action.
🔹 Dark Mode Support
The system's Dark Mode setting is automatically detected and the theme is applied. You can use the app comfortably at night.
🔹 Information Messages
Information messages are displayed at the bottom of each calculation screen, providing information on relevant laws and practical precautions. You can check the legal basis for calculations and check for easily overlooked practical points.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎯 Recommended for:
✓ Lawyers: Drafting lawsuits, claiming monetary claims, handling inheritance cases
✓ Judicial Scriveners: Registration work, calculating deadlines, inheritance consultations
✓ Court officials: Case processing, deadline management
✓ Law firm staff: Practical assistance, verifying calculations
✓ Law school students: Case practice, preparing for mock trials
✓ General public: Calculating interest on loans, confirming expected inheritance shares
Quickly and accurately perform the most frequently used calculations in legal practice! An essential tool for lawyers, judicial scriveners, court staff, and law school students. Easily handle complex legal calculations with an intuitive interface.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
📅 Period Calculation - An Essential Feature for Litigation Practice
Completely supports period calculations, a crucial aspect of litigation practice.
🔹 Forward Calculation (Start Date + Period = End Date)
Use this calculator to calculate the deadline for filing a response from the filing date of a complaint or to calculate the expiration date from the contract start date. Simply enter the start date and the desired period (in days, weeks, months, or years) and the calculator will automatically calculate the exact end date.
🔹 Backward Calculation (End Date - Period = Start Date)
This feature is useful for cases where a backdated period is required. For example, it's useful for calculating the date of a judgment from the deadline for filing an appeal, or calculating the start date of a contract from a specific expiration date. Enter the end date and period, and the start date will be automatically calculated.
🔹 Freedom to Select Period Units
You can display periods in various units to suit your needs:
Days Only (e.g., 45 days)
Weeks + Days (e.g., 6 weeks, 3 days)
Months + Days (e.g., 1 month, 15 days)
Years + Days (e.g., 1 year, 10 days)
Years + Months + Days (e.g., 1 year, 2 months, 5 days)
🔹 Real-Time Period Adjustment
Quickly adjust the number of days with the +/- buttons without opening the date selection screen. With intuitive animations and real-time updates of deadlines, you can quickly compare and review multiple scenarios.
🔹 Holiday and Weekend Notifications
If the calculated end date falls on a weekend or holiday, a notification will automatically appear. This helps practitioners avoid missing deadline extensions under relevant laws, such as the Civil Procedure Act.
🔹 iOS-Style Date Picker
The iOS-style drumroll date picker is also available on Android. You can select it in Settings and customize the interface to your personal preference.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
💰 Interest Calculation - The Core of Monetary Claims
This app provides essential interest calculation features for monetary claims, such as loans, damages, and unjust enrichment.
🔹 Enter Principal and Interest
Principal can be entered up to 12 digits (in trillions), with automatic display of thousands separators for improved readability. Interest rates can be accurately entered up to three decimal places based on the annual interest rate.
🔹 Select Period Calculation Method
Both commonly used interest calculation methods are supported:
Period Calculation Method: Calculate the period using the (end date - start date) method. This is a common period calculation method according to Article 163 of the Civil Act, and the principle of excluding the first day of the month applies.
365-Day Installment Method: Calculate pro rata based on a 365-day year. This method calculates interest based on exactly 365 days per year.
🔹 Real-time Calculation Results
As soon as you enter the principal, interest rate, and term, the following information is calculated and displayed in real time:
Period: Displayed in years and days (e.g., 1 year 45 days)
Interest: Accrued interest amount
Total: Total principal + interest
Calculation Formula: Clear display of the applied calculation formula
🔹 Calculation Formula Display
This feature not only displays the result but also clearly displays the calculation formula used. This is extremely useful when you need to clearly state the basis for the calculation when preparing a court filing.
🔹 Date Management Function
Similar to the period calculation function, this feature provides the ability to reset the start and end dates to today and quickly adjust dates using the +/- buttons. This allows you to quickly compare multiple scenarios.
🔹 Legal Information Guide
This feature provides brief guidance on legal regulations related to interest calculations, helping practitioners quickly check the legal basis.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
👨👩👧👦 Inheritance Calculation - Family Law Practical Support
This is a specialized function that automatically calculates the statutory inheritance share and reserved portion under the Civil Act.
🔹 Enter Inheritance and Contributions
You can enter the total inheritance and the contribution of a specific heir. Contributions are recognized as amounts specifically contributed to the maintenance or increase of the deceased's assets, as stipulated in Article 1008-2 of the Civil Act.
🔹 Heir Configuration
You can enter the exact configuration of an actual inheritance case:
Select whether or not you have a spouse (toggle ON/OFF)
Enter the number of children (easily adjust with the increase/decrease buttons)
Enter the number of direct ascendants (up to 2, enabled only if you have no children)
Enter the number of siblings (enabled if you have neither children nor direct ascendants)
🔹 Automatic Rank Determination
The system automatically determines the order of inheritance according to the Civil Code based on the entered heir configuration. If a lower-ranking heir is excluded from inheritance, the corresponding input field will be automatically disabled.
🔹 Automatic Calculation of Statutory Share
Automatically calculates the statutory share of each heir according to Article 1009 of the Civil Act:
Spouse's share: 1.5 times if jointly inherited with a direct descendant or direct ascendant
Equal shares for children, direct ascendants, and siblings
Adjusted inheritance shares reflecting contributions, if any
🔹 Automatic Calculation of Reserved Share
Automatically calculates the reserved share of each heir according to Articles 1112 and 1113 of the Civil Act. The reserved share is the minimum share of inheritance that cannot be infringed upon by the decedent's will or gift, and is essential information to verify in cases claiming the return of the reserved share.
🔹 Display of Contributor Classification
If a contribution has been entered, the calculation result for that heir is displayed with a blue background for easy identification.
🔹 Displaying Inheritance Rank Information
The current inheritance rank is clearly displayed at the top of the calculation results. (Example: "First-Purpose Inheritance - Children and Spouse", "Second-Purpose Inheritance - Direct Ancestors and Spouse")
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✨ Perfect User Experience
🔹 Intuitive Interface
Designed for ease of use, even for non-legal experts. Each input field has clear icons and colors, and the calculation results are displayed neatly in a structured card format.
🔹 Real-Time Responsive Calculation
The calculation results update in real time as any input value changes. You can view the results seamlessly without having to press a separate calculate button.
🔹 Animation Effect
A smooth flip animation is applied when the numbers change, making the visual changes clearer. This thoughtful detail further enhances the user experience.
🔹 Haptic Feedback
Vibration feedback is provided whenever a button is pressed or a value is changed, allowing you to feel your touch input accurately recognized.
🔹 Toast Notification
A simple guidance message appears at the top of the screen when major actions, such as switching modes or resetting the date, are performed. This provides a clear understanding of the current action.
🔹 Dark Mode Support
The system's Dark Mode setting is automatically detected and the theme is applied. You can use the app comfortably at night.
🔹 Information Messages
Information messages are displayed at the bottom of each calculation screen, providing information on relevant laws and practical precautions. You can check the legal basis for calculations and check for easily overlooked practical points.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎯 Recommended for:
✓ Lawyers: Drafting lawsuits, claiming monetary claims, handling inheritance cases
✓ Judicial Scriveners: Registration work, calculating deadlines, inheritance consultations
✓ Court officials: Case processing, deadline management
✓ Law firm staff: Practical assistance, verifying calculations
✓ Law school students: Case practice, preparing for mock trials
✓ General public: Calculating interest on loans, confirming expected inheritance shares
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About the developer
커먼소스
contact@commonsourcelab.com
동작구 만양로8길 50, 107동 503호 (노량진동, 우성아파트)
동작구, 서울특별시 06917
South Korea
+82 10-7141-0330
