Comparison

FOREWARN vs Rent Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FOREWARN

This app provides instant due diligence on prospects, enabling users to verify identities, identify criminal history, and assess financial risks. It helps users plan for in-person interactions with greater confidence and proactively address potential risks.

Highlights
  • Instant due diligence
  • Prospect identification/verification
  • Criminal history identification
  • Asset ownership verification
  • Financial risk assessment
  • Safe interaction planning
Features
Read full description

Note: You must have a current FOREWARN® account to utilize this app. SAFER ENGAGEMENTS. SMARTER INTERACTION. Download the FOREWARN app for instant due diligence: • Positively identify/verify over 80% of prospects • Identify if your prospect has a criminal history • Verify current asset ownership • Verify financial risks • PROPERLY AND SAFELY PLAN FOR IN PERSON INTERACTIONS WITH A HIGHER LEVEL OF CONFIDENCE It’s time to proactively address risk! FOREWARN, LLC (“FOREWARN”) is not a “consumer reporting agency” and its services do not constitute “consumer reports”, as these terms are defined by the Fair Credit Reporting Act, 15 U.S.C. § 1681 et seq. (“FCRA”) or similar state statutes. Accordingly, FOREWARN services may not be used in whole or in part as a factor in establishing an individual’s eligibility for credit, insurance, employment, or any other eligibility purpose permitted by the FCRA. FOREWARN and related marks are trademarks of FOREWARN, LLC.

About

Rent Calculator

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.

Highlights
  • 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
Features
Read full description

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

Screenshots

FOREWARN3 screens
Rent Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: FOREWARN at none against Rent Calculator's 4. FOREWARN also leads on ratings volume (29K vs 5) and iOS requirement (15.1 vs 17.0). Rent Calculator's advantage is review sentiment (100% vs 78%). On price, rating, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Rent Calculator sells 4 in-app purchases, starting at $2.99 per month. FOREWARN asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for FOREWARN against 5.0 for Rent Calculator. That said, the two scores are not equally well evidenced: FOREWARN has 29K ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 78% of FOREWARN's written reviews are positive against 100% of Rent Calculator's.

UpkeepUpdate frequency

FOREWARN ships an update every 5 weeks, Rent Calculator every 2 months. The most recent releases landed on November 5, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
FOREWARN versus Rent Calculator: the parameters behind the verdict, then further details
ParameterFOREWARNRent Calculator
PriceFreeFree
Rating4.9 (29K ratings)5.0 (5 ratings) — better
Positive reviews77.6% of reviews100.0% of reviews — better
Number of ratings29K — better5
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size30 MB8 MB
Age rating4+4+
DeveloperForewarn LLCIROIRO LLC

Customer experience

FOREWARN

All ratings28,699 ratings
Positive98.9%
Neutral0.6%
Negative0.5%
Written reviews143 reviews
Positive77.6%
Neutral2.1%
Negative20.3%

Rent Calculator

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

FOREWARN

Reported bugs

2 issues
  • App crashes or becomes unavailable
  • Login and account setup issues

Requested features

3 requests
  • Ability to directly call from the app
  • Improved accuracy and data reliability
  • More flexible subscription options

Rent Calculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

FOREWARN

No in-app purchases

4 purchases

Rent Calculator

Subscriptions2
  • Premium - Monthly$2.991 Month
  • Premium - Annual7 Days trial$19.991 Year
One-time2
  • Premium - Lifetime [Loyalty Price]$39.99
  • Premium - Lifetime$49.99

Questions

Is FOREWARN free?
FOREWARN is free to download, with no in-app purchases.
Is Rent Calculator free?
Rent Calculator is free to download, with in-app purchases available.
Which has better reviews, FOREWARN or Rent Calculator?
Rent Calculator is rated higher. FOREWARN averages 4.9 out of 5 from 29K ratings, while Rent Calculator averages 5.0 from 5 ratings.
Do FOREWARN or Rent Calculator have ads?
Neither FOREWARN nor Rent Calculator shows ads.
Which is updated more often, FOREWARN or Rent Calculator?
FOREWARN ships an update every 5 weeks, and Rent Calculator every 2 months. Most recently, FOREWARN was updated on November 5, 2026 and Rent Calculator on November 2, 2026.

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