# 1+1 Calculator: Money & FIRE — Savings, interest & budgets > Minimalist calculator app for iPad and iPhone with advanced clipboard. (iPhone/iPad app by HUY HOANG.) - Source: https://appshunter.io/ios/app/1-plus-1-calculator-money-and-fire/id922309782 (this page in markdown: same URL + `.md`) - Developer: [HUY HOANG](https://appshunter.io/developer/922309781) - Category: Utilities, Productivity - Price: $24.99 with in-app purchases - Rating: 4.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.0 · 14 MB - Languages: American English, Dutch, French (France), German (Germany), Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan), Vietnamese - Released: 2015-05-27 - Data updated: 2026-09-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/1-plus-1-calculator-money-and-fire/id922309782/reviews.md ## What is 1+1 Calculator? 1+1 Calculator does the math and shows its work. Most calculators hand you an answer and forget it. This one keeps a running tape on the main screen — every expression and every result, with correct operator precedence — so you can check your reasoning, catch the slip, and tap any earlier answer to bring it back down. EVERYDAY MATH • An always-on tape, so you see the steps and not just the total • Calculators in tabs to keep separate jobs apart — name them, and each one works on its own • A scientific mode with trig, logs, powers, roots and parentheses • VAT / GST: enter net, tax or gross and get the other two instantly, at a starting rate you can edit • Tip & split: enter the bill, pick a tip, split it across the table • A memory bank for the values you keep reaching for MONEY, LOOKING AHEAD • Budget and trip-budget planners for what you actually spend • An interest calculator that shows how savings compound • A FIRE calculator to estimate your path to financial independence MADE FOR iPhone AND iPad • A warm, modern design with eight color themes • System, Light or Dark, however you like it • Two calculators side by side on iPad • Hardware keyboard support, and a Control Center button to launch straight in (iOS 18 or later) Free includes every calculator, one clean tab at a time. Infinity — a one-time purchase, or a monthly or yearly auto-renewing subscription — keeps every tab unlocked, gives you a tape up to 10,000 calculations deep, all eight themes, and two calculators side by side on iPad. No ads. No tracking. No account. Just a fast, honest calculator. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://calculator.huyhoang.nl/privacy ## Key features - Minimalist design - Modernized calculator experience - Advanced clipboard mechanism - Premium color schemes - Personalization options ## Pricing and in-app purchases Base price: $24.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Advertisements | $2.99 | one-time | ## Frequently asked questions about 1+1 Calculator ### What makes 1+1 Calculator different from other calculators? 1+1 Calculator offers a modernized classic experience with an advanced clipboard mechanism, replacing traditional memory buttons. It also features premium color schemes for personalization. ### Can I personalize the look of 1+1 Calculator? Yes, you can choose from premium color schemes like Gold, Silver, and Space Gray to match your device's aesthetic. ### What devices is 1+1 Calculator available on? 1+1 Calculator is designed for iPad and iPhone, and is also supported on iPod. ### Is 1+1 Calculator free to use? Yes, 1+1 Calculator is free to download and use. It may offer in-app purchases for additional features or customization options. ### How often is 1+1 Calculator updated? The latest version, 1.5, was released on August 11, 2015. Updates are not frequent, with the last update being in 2015. ### What is the age rating for 1+1 Calculator? 1+1 Calculator has an age rating of 4+, making it suitable for young users and general audiences. ### Does 1+1 Calculator have ads? No, 1+1 Calculator does not contain advertisements, as indicated by the absence of an 'hasAds' flag. ### What kind of user feedback does 1+1 Calculator have? Based on the available data, 1+1 Calculator has a rating of 4.0 stars from 1 rating, suggesting generally positive initial user reception. ## Version history (last 5 releases) ### 2.2.0 — 2026-09-08 Duplicate any tab and the copy opens with the same numbers, then goes its own way — an easy way to try a second version of a calculation without losing the first. This release also brings a round of fixes and refinements throughout the app. ### 2.1.1 — 2026-09-05 This update includes bug fixes and under-the-hood improvements for a smoother, more reliable calculator. ### 2.1.0 — 2026-09-02 Long-press the AC button to reveal a context menu for clearing the current calculator's entire history. ### 2.0.1 — 2026-08-15 The tab overview now opens and scrolls smoothly, even with lots of tabs open. ### 2.0.0 — 2026-07-09 A from-scratch rebuild for modern iPhone and iPad: an always-on calculation tape, calculator tabs, a scientific mode, plus VAT/GST, tip, interest and FIRE calculators. No ads. ## Apps similar to 1+1 Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [MySelective](https://appshunter.io/ios/app/myselective/id582172740) | 4.7 (3,826) | Free | Utilities | | [Chytré Kalkulačky PRO](https://appshunter.io/ios/app/chytre-kalkulacky-pro/id1511761940) | — | $2.99 | Utilities | | [UAE Gratuity Calculator](https://appshunter.io/ios/app/uae-gratuity-calculator/id1196424000) | 5.0 (1) | $1.99 | Utilities | ## More apps by HUY HOANG - [Panda Dictionary & HSK Trainer](https://appshunter.io/ios/app/panda-dictionary-and-hsk-trainer/id1050305406) - [FX Cat: Currency Converter](https://appshunter.io/ios/app/fx-cat-currency-converter/id6763938481) All apps by HUY HOANG: https://appshunter.io/developer/922309781 --- *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.*