# InterestLab — Mortgage, loans & savings

> Mortgage, loans & savings (iPhone/iPad app by Gilberto Jose de Nazare.)

- Source: https://appshunter.io/ios/app/interestlab/id6789609586 (this page in markdown: same URL + `.md`)
- Developer: [Gilberto Jose de Nazare](https://appshunter.io/developer/6776466084)
- Category: Finance
- Price: Free with in-app purchases (on sale, was $2.99)
- Age rating: 4+
- Requires: iOS 18.0 · 5 MB
- Languages: American English
- Released: 2026-07-16
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/interestlab/id6789609586/reviews.md

## What is InterestLab?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| InterestLab Premium | $2.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-07-29

Enhanced user interface with improved usability.

### 1.0 — 2026-07-16

No release notes.

## More apps by Gilberto Jose de Nazare

- [JurosLab](https://appshunter.io/ios/app/juroslab/id6776466082)
- [A Divina Misericórdia: Terço](https://appshunter.io/ios/app/a-divina-misericordia-terco/id6782203242)

All apps by Gilberto Jose de Nazare: https://appshunter.io/developer/6776466084

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*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 2026-07-29.*