# 1+1 Calculator: Tape & Tip — Scientific, VAT & split bills

> 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-tape-and-tip/id922309782 (this page in markdown: same URL + `.md`)
- Developer: [HUY HOANG](https://appshunter.io/developer/922309781)
- Category: Utilities, Productivity
- Price: $19.99 with in-app purchases (on sale, was $24.99)
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 15 MB
- Languages: American English, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek, Italian, Japanese and 8 more
- Released: 2015-05-27
- Data updated: 2026-10-22
- Monetization: free with in-app purchases

## 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
• Binary for bits and bytes: 8- to 64-bit words, signed or unsigned, AND / OR / XOR / NOT and shifts, with every carry worked out
• 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: $19.99.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| 1+1 Infinity 1 month subscription | $2.99 | per month |
| Infinity Annual Subscription | $14.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 1+1 Infinity Lifetime Purchase | $24.99 | one-time |
| Remove Advertisements | $2.99 | one-time |


## Is 1+1 Calculator safe?

Not enough ratings yet to assess 1+1 Calculator.

## Is 1+1 Calculator legit?

1+1 Calculator: Tape & Tip appears to be a legitimate app. The AppsHunter Legitimacy Score for 1+1 Calculator is 90 out of 100 points across 7 verification signals from App Store and developer data.


## 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)

### 2.4.1 — 2026-10-19

• New language: Greek.
• Bug fixes and more accurate results.

### 2.4.0 — 2026-10-11

• Added languages: Swedish, Czech, and Portuguese (Brazil and Portugal).
• Improved app performance.

### 2.3.0 — 2026-09-25

• New Binary calculator with worked steps.
• Clearer binary overflow warnings.
• ± key for the scientific calculator.
• Improved VoiceOver support.
• Fixes: the scientific angle mode and the binary word size now survive a relaunch, and the tax rate is right for Taiwan, Hong Kong and Macau.
• Added Italian, Finnish, Danish, and Norwegian Bokmål.

### 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.

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## 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

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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 2026-10-22.*