This app provides landlords, property managers, and tenants with six specialized calculators to accurately determine prorated rent, late fees, security deposit interest, and rent increases. It includes built-in state law guidance for all 50 states and DC, along with property and lease management features and smart alerts.
2.0.2
April 15, 2026
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
MoreFull access to all pro tools, billed monthly.
$49.99
Premium - Lifetime
Unlock everything forever with a single purchase.
Prorate Calculator Pro is a utility app designed to help landlords, property managers, and tenants accurately calculate prorated rent, late fees, security deposit interest, and rent increases. It offers six specialized calculators with built-in state law guidance for all 50 states plus DC.
No, Prorate Calculator Pro does not contain advertisements. The app is free to start with core calculators and offers a premium upgrade for additional features.
The rent proration and affordability calculators are available for free with no usage limits. These tools allow users to perform essential calculations without needing to upgrade.
The Premium upgrade unlocks all six calculators, comprehensive property management features, iCloud sync, smart alerts, AI-powered insights, widgets, and move-in/move-out photo documentation. This provides a complete solution for property management needs.
The app includes built-in guidance for state laws across all 50 states and DC. This ensures that calculations for late fees, rent increases, and other financial aspects are accurate and legally defensible according to local regulations.
Prorate Calculator Pro is available on iPhone, iPad, and iPod devices. It is designed to be accessible across Apple's mobile ecosystem.
The app was last updated on April 15, 2026, indicating it receives regular updates to ensure functionality and compliance with current laws and features. The latest version is 2.0.2.
Prorate Calculator Pro has received excellent user feedback, holding a 5.0-star rating from 5 reviews. This suggests a high level of user satisfaction with its accuracy and features.
