LoanPro

LoanPro is a fast Android financial calculator for mortgage, auto, credit card, and personal loan scenarios.

Enter any three of loan amount, payment, term, and interest rate, then tap the missing value to solve it. Mortgage-focused views add taxes, insurance, down payment, LTV, PMI, and bi-weekly calculations without adding ads, analytics, tracking, or network access.

The screenshots above are the same F-Droid listing images tracked under fastlane/metadata/android/en-US/images/phoneScreenshots/.

Features

• Calculate payment, loan amount, term, or interest rate.
• Add taxes and insurance for PITI views.
• Calculate price, down payment, loan amount, and LTV.
• View PMI and bi-weekly loan details.
• Use calculator-style entry with percent, decimal, backspace, memory, and clear behavior tuned for repeated calculations.
• Runs fully offline with no network permission.

Getting Started

LoanPro works around four core values: amount, payment, term, and interest. Enter a value, tap the bucket it belongs to, repeat until three values are stored, then tap the missing bucket to calculate it.

Example payment calculation:

1. Enter 150000, then tap Amt.
2. Enter 30, then tap Term.
3. Enter 4.75, then tap Int.
4. Tap Pmt to calculate a monthly payment of $782.47.

Example loan amount calculation:

1. Enter 150, then tap Pmt.
2. Enter 3, then tap Term.
3. Enter 7.9, then tap Int.
4. Tap Amt to calculate a loan amount of $4,793.82.

Example term calculation:

1. Enter 12000, then tap Amt.
2. Enter 200, then tap Pmt.
3. Enter 4.9, then tap Int.
4. Tap Term to calculate 5.75 years.
5. Tap Term again to view the same result as 68.97 months.

Example interest-rate calculation:

1. Enter 25000, then tap Amt.
2. Enter 500, then tap Pmt.
3. Enter 5, then tap Term.
4. Tap Int to calculate 7.42%.

Hold Clear to reset stored values. If the payment is too low to cover interest, LoanPro shows Pmt Low; increase the payment, lower the rate, or reduce the amount before solving term.

Mortgage Extras

• Tap Pmt repeatedly after entering tax and insurance to cycle through P+I and PITI views.
• Use Price and Down to calculate loan amount from purchase price and down payment.
• Tap Down again to cycle between percent and dollar views.
• Use Shift + Term for bi-weekly information, then continue pressing Term to cycle through term, interest savings, total interest, total principal, and total P+I.

The full in-app help page lives at app/src/main/res/raw/quick_start_guide.htm.

Project

• Single-module Android app under :app.
• Package/application ID: net.kaltner.LoanPro.
• Current release: 1.0.2 (versionCode 10002).
• Minimum SDK: 21.
• Target/compile SDK: 36.
• License: Apache-2.0.
• No network permissions, analytics, ads, Play Services, Firebase, or crash-reporting SDKs.

Build

ANDROID_HOME=$HOME/Android/Sdk ./gradlew --no-daemon :app:assembleDebug
ANDROID_HOME=$HOME/Android/Sdk ./gradlew --no-daemon testDebugUnitTest

Release signing is configured through environment variables when needed:

export LOANPRO_RELEASE_STORE_FILE=/path/to/keystore.jks
export LOANPRO_RELEASE_STORE_PASSWORD=...
export LOANPRO_RELEASE_KEY_ALIAS=...
export LOANPRO_RELEASE_KEY_PASSWORD=...

ANDROID_HOME=$HOME/Android/Sdk ./gradlew --no-daemon :app:assembleRelease

Original signing keys are not included in this repository.

Store and F-Droid Metadata

Fastlane/F-Droid metadata lives under fastlane/metadata/android/en-US/.

• Title: fastlane/metadata/android/en-US/title.txt
• Short description: fastlane/metadata/android/en-US/short_description.txt
• Full description: fastlane/metadata/android/en-US/full_description.txt
• Changelog: fastlane/metadata/android/en-US/changelogs/
• Listing icon: fastlane/metadata/android/en-US/images/icon.png
• Phone screenshots:
  • fastlane/metadata/android/en-US/images/phoneScreenshots/1.jpg
  • fastlane/metadata/android/en-US/images/phoneScreenshots/2.jpg

F-Droid consumes those Fastlane image paths during metadata import, so no separate screenshot capture task is pending for the current listing.