# Calc vs hiup

The clearest difference is review sentiment: Calc at 81% against hiup's 0%. hiup's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.6). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Calc sells 2 in-app purchases, starting at $0.99 per month. hiup asks for nothing beyond the download.

Calc ships an update every 2 months, hiup every 6 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calc | hiup |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (28 ratings)](https://appshunter.io/ios/app/calc/id285807159/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | **80.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 1 MB | 18 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mike Wesemann](https://appshunter.io/developer/285807162) | [ShenZhen Lenze Technology Co,.Ltd.](https://appshunter.io/developer/1190864538) |

## What reviewers say

### Calc

[App page](https://appshunter.io/ios/app/calc/id285807159)

A visually appealing and straightforward calculator app for iPhone and iPad. It offers a unique user interface with support for basic and scientific calculations, various number base conversions, and currency and unit conversions.

**Highlights:** Universal app for iPhone and iPad, Basic and scientific calculations, Number base conversions (decimal, hex, binary, octal), Currency and unit conversions, Scrollable calculation history, 10 color themes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calc Pro | $0.99 | per month |
| Calc Pro | $4.99 | per year |

**What reviewers like**

- 🚀 Free app
- 👍 Simple and easy to use
- 📜 Tape/history feature
- 🎨 Customizable colors
- 📤 Ability to email calculations

**What reviewers complain about**

- 🐛 Crashes or freezes on some devices
- 🔊 Annoying key click sounds
- 📜 Scrolling to see recent calculations
- 🔍 Overcrowded interface with too many functions

**Reported bugs**

- Percentage calculations not working correctly
- Cos 90 showing incorrect result

**Requested features**

- Copy and paste support
- Larger buttons for easier use
- Ability to clear calculation history
- Auto-insert previous result when using operators
- Landscape mode support


### hiup

[App page](https://appshunter.io/ios/app/hiup/id1512929543)

This utility app reminds parents not to forget their children in the car, especially when using child seats. It aims to enhance child safety by preventing accidental heatstroke or other dangers.

**Highlights:** Child seat safety reminder, Prevents forgotten children, Designed for car use, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calc free?

Calc is free to download, with in-app purchases available.

### Is hiup free?

hiup is free to download, with no in-app purchases.

### Do Calc or hiup have ads?

Neither Calc nor hiup shows ads.

### Which is updated more often, Calc or hiup?

Calc ships an update every 2 months, and hiup every 6 weeks. Most recently, Calc was updated on October 22, 2026 and hiup on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*