Prorate Calculator Pro
Landlord Rent & Lease Toolkit
Free · In‑App Purchases · Designed for iPad
Landlords: stop guessing at prorated rent, late fees, and deposits. 6 calculators with built-in state law guidance for all 50 states + DC. Free to start.
Stop guessing at prorated rent, late fees, and deposit deadlines. Prorate Calculator Pro gives landlords, property managers, and tenants six calculators with built-in state law guidance for all 50 states plus DC — so every number you share is accurate and defensible.
SIX CALCULATORS
• Rent Proration — Get the daily rate and prorated amount instantly using Actual Days, Banker's Month, or Annual Rate methods. Compare all three side by side for your apartment, condo, or home.
• Affordability — Evaluate tenant income against the 3x Monthly, 40x Annual, and HUD 30% benchmarks. Works both directions. Always free.
• Late Fee — Calculate flat or percentage-based fees with state-specific grace periods and fee caps. Know exactly what you can legally charge.
• Security Deposit Interest — Compute interest owed on tenant deposits with state and city-level rates. Tracks the return deadline after move-out.
• Rent Increase — Check proposed increases against state rent caps with live CPI data for California, Oregon, DC, and more. Flags notice period requirements.
• Utility Split — Allocate shared bills across rental units using equal, square footage, occupant, or hybrid methods with per-unit breakdowns.
PROPERTY AND LEASE MANAGEMENT
Track your properties, tenants, and leases in one place. See lease status, days remaining, and expiration alerts at a glance. Open any calculator from a lease and inputs auto-populate with the lease data.
SMART ALERTS
Automatic notifications for lease expirations at 90, 60, and 30 days. Monthly rent due reminders. Deposit return deadline alerts. Rent increase notice period warnings.
AI-POWERED INSIGHTS
On-device intelligence ranks your upcoming lease events by urgency and surfaces plain-language next steps. 100% on-device — no data leaves your phone.
FREE TO START
The rent proration and affordability calculators are free with no limits. Upgrade to Premium to unlock all six calculators, property management, iCloud sync, smart alerts, AI insights, widgets, and move-in/move-out photo documentation.
Questions or feedback? Contact us at support@iroiro.us
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://iroiro.us/pages/privacy-policy.html
Prorate Calculator Pro has been completely rebuilt from the ground up.
NEW CALCULATORS
Four new calculators join the original rent proration engine:
— Late Fee: Calculate flat or percentage-based fees with state-specific grace period and fee cap guidance for all 50 states plus DC.
— Security Deposit Interest: Compute interest owed on tenant deposits with state and city-level rates. Tracks the return deadline after move-out.
— Rent Increase: Check proposed increases against state rent caps with live CPI data for California, Oregon, DC, and more.
— Utility Split: Allocate shared bills across units using equal, square footage, occupant, or hybrid methods.
**The Affordability Calculator is also new and completely free — evaluate tenant income against the 3x, 40x, and 30% HUD benchmarks.**
PROPERTY AND LEASE MANAGEMENT
Create and manage properties, tenants, and leases. Track lease status with countdown badges. Open any calculator from a lease and inputs auto-populate with the lease data.
SMART NOTIFICATIONS
Automatic alerts for lease expirations (90/60/30 days), monthly rent due reminders, deposit return deadlines, and rent increase notice periods.
AI-POWERED INSIGHTS
On-device intelligence surfaces your most urgent upcoming events with plain-language summaries and suggested actions. 100% on-device — no data leaves your phone.
ALSO NEW
— Home screen and lock screen widgets
— Move-in/move-out photo documentation
— iCloud sync across all your devices
— Guided onboarding with state-law personalization
— Rent roll PDF export
— Redesigned calculation history with favorites, search, and shareable reports
The developer, IROIRO LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- IROIRO LLC
- Size
- 7.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium - Annual $19.99
- Premium - Monthly $2.99
- Premium - Lifetime [Loyalty Price] $39.99
- Premium - Lifetime $49.99
- Copyright
- ©2018 IROIRO, LLC