--- title: "InterestLab - Reviews, Revenue and Downloads in Brazil | Apple App Store" description: "InterestLab is a complete financial calculator toolkit for everyday money decisions — from mortgages and loan payoffs to savings, interest rates, and dates. Clean, fast, and fully offline. Whether yo" --- # InterestLab — Brazil ![InterestLab App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/23/c3/2a/23c32ab1-471e-ff95-3f83-5c91dd474309/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Gilberto Jose de Nazare](https://apptail.io/developer/gilberto-jose-de-nazare-jhsfxc) **Category:** Finance **Rating:** 5.0/5 (1 ratings) **Price:** Free **Bundle ID:** com.gilbe.InterestLab **Store:** Apple App Store **Country:** Brazil **Version:** 1.2 (released 2026-10-23) **Original Release:** 2026-07-16 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/br/app/app/id6789609586) **AppTail Page:** [https://apptail.io/app/interestlab-iQZA/brazil](https://apptail.io/app/interestlab-iQZA/brazil) ## InterestLab Description InterestLab is a complete financial calculator toolkit for everyday money decisions — from mortgages and loan payoffs to savings, interest rates, and dates. Clean, fast, and fully offline. Whether you're comparing a home loan, planning to pay off a credit card faster, or projecting how your savings will grow, InterestLab gives you clear numbers, helpful charts, and a shareable PDF — all in seconds. WHAT YOU CAN DO . Mortgage — Enter the home price, down payment, rate, and term to see your monthly principal & interest, total interest, payoff date, a balance-over-time chart, and a full amortization schedule you can export as a PDF. . Loan Payoff — See how long until a balance is paid off and how much interest you'll pay. Add an extra monthly amount to see the time and interest you'd save. . APR ↔ APY — Convert between the nominal (APR) and effective (APY) annual rate for any compounding frequency — the fast way to compare loan and savings offers. . Savings with Deposits — Project growth with recurring monthly deposits, an optional yearly deposit increase, and inflation. Watch it build with a growth curve and an invested-vs-earnings breakdown. . Fixed Income — Model a lump-sum investment over days, months, or years, with inflation-adjusted results. . Loan Rate Finder — Discover the true interest rate hidden in a set of fixed payments — perfect for comparing financing offers. . Variable Income — Track gains and losses on any asset from purchase to sale, with daily, monthly, and annual rates. . Gains (Run-up) & Losses (Drawdown) — Understand the percentage needed to recover a loss, or given back after a gain. . Equivalent Rates & Stated Rate — Convert rates between periods and work with stated/effective rates (SAR / ER). . Dates — Days between two dates (calendar and business days), add or subtract time, and track ages, events, and anniversaries. . History — Save any calculation, search your records, and export or share results as a clean PDF. BUILT FOR PRIVACY InterestLab works fully offline. There are no accounts, no sign-in, no ads, and no tracking. Everything you calculate and save stays on your device — we never see your data. SIMPLE, POLISHED, FAST A tidy home screen, native charts, haptic feedback, Dark Mode, and Dynamic Type support make InterestLab a pleasure to use on any iPhone. PREMIUM (OPTIONAL) The free version covers everyday calculations. A single one-time purchase unlocks unlimited terms for long-range projections — no subscription, ever. Disclaimer: InterestLab provides estimates for informational purposes only and is not financial, tax, or legal advice. Always verify results and consult a professional before making financial decisions. ## InterestLab Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ea/d5/59/ead55946-7cdc-f6b5-8071-ddac65236934/Design_sem_nome-9.png/1179x2556.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9b/90/d5/9b90d5e4-ab5a-e2e3-cf72-b4717e7c280e/2.png/1179x2556.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/35/7f/ef/357fef86-5cf8-8c44-2b2b-29cd63b210cb/3.png/1179x2556.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/32/d3/65/32d365be-d838-2a8b-ada4-e0886f887763/4.png/1179x2556.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/99/0b/81/990b81c3-0d4c-2c2b-8363-8397242ce9c4/5.png/1179x2556.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ec/8b/dd/ec8bdd95-686e-0c93-a12b-b6dcc0583d4f/6.png/1179x2556.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/15/da/df/15dadfdb-54be-bf05-0a12-bf0e1fe2a0ae/7.png/1179x2556.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c9/4c/4c/c94c4c93-c91f-a475-75aa-6e4125d79c34/8.png/1179x2556.png) ## InterestLab Rating Breakdown in Brazil - 5 stars: 1 (100%) - 4 stars: 0 (0%) - 3 stars: 0 (0%) - 2 stars: 0 (0%) - 1 stars: 0 (0%) ## InterestLab In-App Purchases | Item | Price | |------|-------| | InterestLab Premium | 19.90 R$ | ## InterestLab Available In - [Brazil](https://apptail.io/app/interestlab-iQZA/brazil) - [Hungary](https://apptail.io/app/interestlab-iQZA/hungary) - [Iceland](https://apptail.io/app/interestlab-iQZA/iceland) - [Latvia](https://apptail.io/app/interestlab-iQZA/latvia) - [Netherlands](https://apptail.io/app/interestlab-iQZA/netherlands) - [Slovenia](https://apptail.io/app/interestlab-iQZA/slovenia) - [Türkiye](https://apptail.io/app/interestlab-iQZA/turkey) - [Uzbekistan](https://apptail.io/app/interestlab-iQZA/uzbekistan) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*