# Calo: Scientific Calculator — Unit Converter & Math Notes

> A fast, ad-free calculator with history, customization, and real-time results. (iPhone/iPad app by Space-Time Transformation Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/calo-scientific-calculator/id6670785680 (this page in markdown: same URL + `.md`)
- Developer: [Space-Time Transformation Technology Co., Ltd.](https://appshunter.io/developer/1296151491)
- Category: Finance
- Price: Free
- Rating: 4.67/5 from 18 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 10 MB
- Languages: Korean, German (Germany), Russian, European Spanish, American English, Japanese, Chinese (Simplified, China), French (France)
- Released: 2024-09-12
- Data updated: 2026-10-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calo-scientific-calculator/id6670785680/reviews.md

## What is Calo?

Calo is a free, ad-free calculator for everyday math and deeper exploration. A clean keypad keeps quick calculations simple; switch to scientific mode when you need more.

Calculate with confidence
• A native high-precision engine keeps up to 40 significant digits in results.
• See results as you type. Move the cursor to edit or paste an expression, and use a hardware keyboard on iPad.
• Explore powers, roots, logarithms, trigonometry, factorials and more. Switch between degrees and radians.
• Tap a result to cycle through rounded, full-precision, fraction (when available) and scientific formats. Use memory keys for multi-step work.

Keep your work close
• Search your calculation history, add notes, reuse an earlier expression, or export results as CSV or a receipt-style image.
• Save expressions you use often and insert them with a tap.
• See recent results in Home Screen and Lock Screen widgets. Open Calo from Control Center, or calculate and retrieve your latest result with Siri and Shortcuts.

Make it yours with light and dark themes, accent colors, sounds, Chinese voice pronunciation, adjustable decimal places and optional iCloud sync.

## Key features

- Calculation history
- Segmented input method
- iPad split-screen support
- Customizable themes and sounds
- Real-time result display
- Undo and delete functions

## Is Calo safe?

Not enough ratings yet to assess Calo.

## Is Calo legit?

Calo: Scientific Calculator appears to be a legitimate app. The AppsHunter Legitimacy Score for Calo is 85 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/calo-scientific-calculator/id6670785680/reviews.md

### 5/5 — Einfacher für Taschenrechner

*2026-10-22*

Für meinen alltäglichen Gebrauch perfekt gemacht. Funktioniert zuverlässig, eine kurze Supportanfrage wurde schnell und freundlich beantwortet 👍🏻🌻😎

### 4/5 — 人声

*2026-06-07*

为啥最后的计算结果没有人声报数呢？🤔

**Developer response:** 你好，最新版本已经支持

### 5/5 — Super

*2026-05-28*

I love it back up

### 5/5 — pi

*2025-11-20*

calculated

### 5/5 — Calculator Works Great!

*2025-10-12*

This calculator is excellent! The calculator has the features that I need and is not cluttered with useless things. The app launches quickly, is easy to read and works smoothly. My thanks to the developer for an excellent app that looks and works great. Job well done!

### 5/5 — The

*2025-09-05*

作者的软件设计风格真好 无广免费 其它的软件也很棒👍👍👍

### 5/5 — nice

*2025-08-29*

nice

### 1/5 — 乘法算不准

*2025-07-20*

有点神奇，这个居然会算不准，53×0.36=19.8 差点就信了

**Developer response:** 你好没有复现，你用的 iOS 版本是多少？

### 5/5 — Great calculator with history!

*2025-04-18*

Thank you for a great calculator with history. Great for doing my monthly budget! Also thanks for the quick response for putting history under calculations. Love all the options!

### 5/5 — Great calculator with history!

*2024-11-24*

Thank you for a great calculator with history. Great for doing my monthly budget! Also thanks for the quick response for putting history under calculations. Love all the options!

## Frequently asked questions about Calo

### Does Calculator⁷ have ads?

No, Calculator⁷ is an ad-free application. This means you can perform calculations without any interruptions from advertisements.

### What is the rating for Calculator⁷?

Calculator⁷ has a strong user rating of 4.6 stars, based on 8 ratings. This indicates a high level of user satisfaction.

### Is Calculator⁷ free to download and use?

Yes, Calculator⁷ is completely free to download and use. There are no costs associated with its basic functionality.

### What devices does Calculator⁷ support?

Calculator⁷ is available for both iPhone and iPad. It also supports iPad split-screen display for enhanced multitasking.

### How often is Calculator⁷ updated?

The latest version, 3.1, was released on 2025-10-13, indicating recent development and support. Updates are frequent, ensuring the app remains reliable and up-to-date.

### What age rating does Calculator⁷ have?

Calculator⁷ has an age rating of 4+. This makes it suitable for a wide range of users, including children and adults.

### Can I customize the appearance of Calculator⁷?

Yes, Calculator⁷ allows for theme color customization and customizable keypress sounds. You can personalize the app's look and feel to your preference.

### Does Calculator⁷ offer a history of calculations?

Yes, Calculator⁷ includes a calculation history feature. This allows you to easily view and access your past computations without needing to re-enter them.

## Version history (last 5 releases)

### 3.2 — 2026-10-22

1. Added a scientific calculator
2. Added a custom formula calculator
3. Refined some UI and interaction details
4. Improved several issues reported by users

### 3.1 — 2025-10-13

1. Add the function to copy the most recent result by long-pressing the APP icon.
2. Add the copy function to the real-time preview of calculation results.

### 2.8 — 2025-09-20

Optimized user experience

### 2.7 — 2025-09-15

Optimized user experience

### 2.6 — 2025-07-09

Optimized user experience

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All apps by Space-Time Transformation Technology Co., Ltd.: https://appshunter.io/developer/1296151491

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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 2026-10-25.*