# Self Storage Calculator — Investing, Cap Rate, Cash Flow > Investing, Cap Rate, Cash Flow (iPhone/iPad app by Gabriel Petersen.) - Source: https://appshunter.io/ios/app/self-storage-calculator/id6815346288 (this page in markdown: same URL + `.md`) - Developer: [Gabriel Petersen](https://appshunter.io/developer/6809217497) - Category: Business, Finance - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Languages: American English - Released: 2026-09-30 - Data updated: 2026-10-05 ## What is Self Storage Calculator? Know the deal before you make the offer. Self Storage Calculator turns your iPhone into a full self-storage underwriting tool. Enter what you know about a facility and in minutes you'll see what it earns today, what it can earn once stabilized, and whether the returns meet your targets. No spreadsheet, no laptop, no guesswork. Built for investors, brokers and operators evaluating real acquisitions, whether you're touring a facility, taking a broker call or deciding between two deals at the end of the day. UNDERWRITE A DEAL, STEP BY STEP A guided flow walks you through every part of the deal. Enter what you have now and fill in optional details later. • Property: the facts of the facility • Unit Mix: tap a unit size to add it, then set counts, in-place rents, market rents and climate control • Operations: revenue, other income and a detailed operating expense P&L • Acquisition & Financing: total project cost, sources and uses, loan terms and interest-only periods • Stabilization: lease-up, rent growth to market and months to stabilization • Expansion (optional): model new rentable square feet with construction cost, timing and lease-up • Hold & Exit: hold period, exit cap rate and selling costs SEE THE WHOLE PICTURE Every deal shows the numbers that matter: • NOI today vs. stabilized, with an NOI bridge showing where the upside comes from • In-place vs. market rent for every unit type • Levered and unlevered IRR, equity multiple and cash-on-cash • DSCR, debt yield, cap rate and yield on cost • A year-by-year cash flow projection through the sale • Projected sale price and net proceeds at exit • Potential value creation from lease-up, rent growth and expansion GET A CLEAR VERDICT Set your own investment targets once. Every deal is scored against them, from STRONG MATCH to BELOW YOUR TARGETS, with each target shown as met or missed. Underwriting flags point out the assumptions that deserve a second look. STRESS-TEST THE DEAL The sensitivity matrix shows how your IRR changes with exit cap rate and stabilized occupancy, so you know how much room you have if the market turns or the lease-up takes longer than planned. EXPORT A PROFESSIONAL PDF MEMO Turn any deal into a polished, multi-page investment memorandum with an investment summary, deal snapshot, unit mix, NOI bridge, sources and uses, annual cash flows, sensitivity analysis, key assumptions and methodology. Share it with partners, lenders or investors straight from your phone. BUILT FOR THE WAY YOU WORK • Unlimited facilities, saved automatically • Duplicate a deal to test a different offer or scenario • Add notes to every deal • Works offline • No account, no login, no sign-up YOUR DEALS STAY PRIVATE All of your data stays on your device. We don't collect, transmit, sell or share your information. Your deal pipeline is nobody's business but yours. SELF STORAGE CALCULATOR PRO Open the app to see a full example analysis. Underwriting, saved deals and PDF exports require a Pro membership. Choose weekly for a single acquisition or annual if you underwrite regularly. Both plans include every feature. Payment is charged to your Apple ID at confirmation of purchase. Your subscription renews automatically unless you cancel at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Your saved deals are never deleted if your subscription ends and reopen as soon as Pro is active again. Privacy Policy: https://gabrielwpetersen.github.io/self-storage-underwriter/privacy.html Terms of Use: https://gabrielwpetersen.github.io/self-storage-underwriter/terms.html Stop guessing on storage deals. Download Self Storage Calculator and underwrite your next facility today. ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Annual Pro | $49.99 | per year | | Weekly Pro | $2.99 | per 7 days | ## Is Self Storage Calculator safe? Not enough ratings yet to assess Self Storage Calculator. ## Is Self Storage Calculator legit? Self Storage Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Self Storage Calculator is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 2 releases) ### 1.0.1 — 2026-10-02 Refinements throughout the app, including clearer wording for the investment memo PDF export. ### 1.0 — 2026-09-30 No release notes. ## More apps by Gabriel Petersen - [Newborn Sleep: Wake Window](https://appshunter.io/ios/app/newborn-sleep-wake-window/id6809217495) - [Nurse Pay](https://appshunter.io/ios/app/nurse-pay/id6809902280) - [Mobile Notary Fee Calculator](https://appshunter.io/ios/app/mobile-notary-fee-calculator/id6812381002) - [FreshScan: Food Expiration](https://appshunter.io/ios/app/freshscan-food-expiration/id6812446608) - [Buddhism: Daily Dharma](https://appshunter.io/ios/app/buddhism-daily-dharma/id6815788287) All apps by Gabriel Petersen: https://appshunter.io/developer/6809217497 --- *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 2026-10-05.*