# Calctan vs 车车外勤通

The clearest difference is update cadence: Calctan at every 3 months against 车车外勤通's every 19 months. 车车外勤通's advantage is iOS requirement (10.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calctan ships an update every 3 months, 车车外勤通 every 19 months. The most recent releases landed on November 6, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calctan | 车车外勤通 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (61 ratings)](https://appshunter.io/ios/app/calctan/id1445480535/reviews)** | — |
| Number of ratings | **61** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | Free | — |
| Size | 9 MB | 20 MB |
| Requires iOS | 16.6 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [北京车车网络技术有限公司](https://appshunter.io/developer/1299608242) |

## What reviewers say

### Calctan

[App page](https://appshunter.io/ios/app/calctan/id1445480535)

This app offers a high-precision scientific and financial calculator with an editable tape for auditing calculations. It supports complex formulas, a wide range of mathematical functions, and customizable constants, all within an ad-free, private interface.

**Highlights:** Smart formula workspace with direct cursor editing, Advanced scientific engine with true order of operations, Auditable calculation history on a digital tape, Exportable reports via AirPrint and PDF, Multitasking support for iPad, iCloud synchronization across devices, Private and ad-free experience

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

**In-app purchases:** none


### 车车外勤通

[App page](https://appshunter.io/ios/app/id1517559809)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calctan free?

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

### Is 车车外勤通 free?

车车外勤通 is free to download, with no in-app purchases.

### Do Calctan or 车车外勤通 have ads?

Neither Calctan nor 车车外勤通 shows ads.

### Which is updated more often, Calctan or 车车外勤通?

Calctan ships an update every 3 months, and 车车外勤通 every 19 months. Most recently, Calctan was updated on November 6, 2026 and 车车外勤通 on October 27, 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.*