# Rent Calculator: Lease Tracker — Prorate Rent & Landlord Tools > Calculators for prorated rent, late fees, deposits, rent increases, and utility splits with state law guidance. (iPhone/iPad app by IROIRO LLC.) - Source: https://appshunter.io/ios/app/rent-calculator-lease-tracker/id1435048159 (this page in markdown: same URL + `.md`) - Developer: [IROIRO LLC](https://appshunter.io/developer/1435048158) - Category: Business, Finance - Price: Free with in-app purchases (on sale, was $1.99) - Rating: 5.00/5 from 5 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 8 MB - Languages: American English - Released: 2018-11-27 - Data updated: 2026-09-10 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/rent-calculator-lease-tracker/id1435048159/reviews.md ## What is Rent Calculator? Prorate Calculator Pro is now Rent Calculator: Lease Tracker, the landlord rent calculator and lease tracker that answers the questions every rental raises, with the state law behind each number, for all 50 states plus DC. SIX CALCULATORS, ONE STATE-LAW ENGINE PRORATED RENT: How much rent is due for a partial month? Enter the rent and the move-in or move-out date. Get the daily rate and prorated amount by Actual Days, Banker's Month (30-day), or Annual Rate, side by side, with your state's preferred method flagged. LATE FEE: What late fee can I legally charge? Flat or percentage fees checked against your state's grace period and fee cap, so the amount on the notice is the amount the law allows. SECURITY DEPOSIT INTEREST: How much interest do I owe on a deposit, and when is the return deadline? State and city interest rates (including Chicago, San Francisco, and Los Angeles) and the security deposit return deadline counted from move-out. RENT INCREASE: How much can I raise the rent? Proposed increases checked against state rent caps, with live CPI for California, Oregon, DC, and more. Notice periods flagged before you send the rent increase letter. AFFORDABILITY: How much rent can a tenant afford? The 3x monthly, 40x annual, and HUD 30% rent-to-income rules, in both directions (income to rent, rent to income), for tenant screening. UTILITY SPLIT: How do I split a utility bill between units or roommates? Equal, square footage, occupant, or hybrid (RUBS) methods with a per-unit breakdown you can share. LEASE TRACKER Properties, tenants, and leases in one place: lease status, days remaining, deposits, and move-in/move-out photo documentation. Open any calculator from a lease and the numbers are pre-filled. ALERTS THAT KEEP YOU COMPLIANT Lease expiration at 90, 60, and 30 days. Rent due reminders. Security deposit return deadlines. Rent increase notice windows. Home Screen and Lock Screen widgets show the next date at a glance. STATE LAW, CITED Every calculation shows the statute behind it, such as Cal. Civ. Code § 1950.5, not a blog post. General guidance, not legal advice. AI INSIGHTS, ON DEVICE Your upcoming lease events ranked by urgency with plain-language next steps. Nothing leaves your phone. FREE TO TRY, THEN PREMIUM Your first 3 calculations are free on any calculator, with full state citations. Premium unlocks unlimited calculations, the lease tracker, alerts and widgets, iCloud sync, and AI insights: monthly, annual with a 7-day free trial, or a one-time lifetime purchase. Questions or feedback? Use Send Feedback in Settings (replies land in the app) or email 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 ## Key features - Rent Proration Calculator (Actual Days, Banker's Month, Annual Rate) - Affordability Calculator (3x Monthly, 40x Annual, HUD 30%) - Late Fee Calculator (Flat, Percentage, Grace Periods) - Security Deposit Interest Calculator - Rent Increase Calculator (State Caps, CPI Data) - Utility Split Calculator (Equal, Square Footage, Occupant) - Property and Lease Management - Smart Alerts for Lease Expirations and Deadlines ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Premium - Monthly | $2.99 | per month | | Premium - Annual | $19.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Premium - Lifetime | $49.99 | one-time | | Premium - Lifetime Loyalty Price | $39.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/rent-calculator-lease-tracker/id1435048159/reviews.md ### 5/5 — Thank you!! *2026-03-14* Best $2 I’ve spent! ### 5/5 — Super helpful with a great UI *2018-11-27* The app is really helpful. I appreciate the share/save feature, especially since it lays out the numbers to explain how it came to it’s calculation. And all this is housed in a nice, clean interface. ## Frequently asked questions about Rent Calculator ### What is Prorate Calculator Pro? 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. ### Does Prorate Calculator Pro have ads? 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. ### What are the free features of Prorate Calculator Pro? 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. ### What is included in the Premium upgrade for Prorate Calculator Pro? 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. ### How does Prorate Calculator Pro handle state-specific laws? 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. ### What devices is Prorate Calculator Pro available on? Prorate Calculator Pro is available on iPhone, iPad, and iPod devices. It is designed to be accessible across Apple's mobile ecosystem. ### How often is Prorate Calculator Pro updated? 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. ### What is the user sentiment for Prorate Calculator Pro? 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. ## Version history (last 5 releases) ### 2.0.3 — 2026-09-04 SIX CALCULATORS, ONE STATE-LAW ENGINE Rent Proration, Late Fee, Security Deposit Interest, Rent Increase, Affordability, and Utility Split. Each one cites the statute behind the number, for all 50 states plus DC. NEW IN 2.0.3 • New name, same app: Prorate Calculator Pro is now Rent Calculator: Lease Tracker. • Try every calculator free. Your first 3 calculations work on any of the six, with full state citations. Premium unlocks unlimited calculations, the lease tracker, alerts, widgets, iCloud sync, and AI insights. Early supporters keep their Lifetime Basic access and loyalty pricing. • Send feedback from Settings and get replies from the studio right in the app. • Manage your subscription from Settings. • Stability improvements. ### 2.0.2 — 2026-04-15 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 ### 2.0.1 — 2026-04-15 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 ### 2.0.0 — 2026-04-13 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 ### 1.1.9 — 2025-04-15 Bug fixes and general updates ## More apps by IROIRO LLC - [Supernatural Atomic Love](https://appshunter.io/ios/app/supernatural-atomic-love/id1515369338) - [17on: A Haiku Poetry Journal](https://appshunter.io/ios/app/17on-a-haiku-poetry-journal/id6443743198) - [MeMemes - Meme & GIF Organizer](https://appshunter.io/ios/app/mememes-meme-and-gif-organizer/id6738795310) - [AsaGoTomo™ - Pan Sticker Pack](https://appshunter.io/ios/app/asagotomo-pan-sticker-pack/id6745231649) - [Rexy: Anime Tracker & Schedule](https://appshunter.io/ios/app/rexy-anime-tracker-and-schedule/id6780322886) All apps by IROIRO LLC: https://appshunter.io/developer/1435048158 ## Related topics [rent calculator](https://appshunter.io/ios/topics/rent-calculator) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*