# 数字化工厂kmf vs Calculator Max

The clearest difference is in-app purchases: 数字化工厂kmf at none against Calculator Max's 1. 数字化工厂kmf also leads on ads (none vs shown) and update cadence (every 2 days vs every 5 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Calculator Max sells 1 one-off in-app purchase. 数字化工厂kmf asks for nothing beyond the download.

数字化工厂kmf ships an update every 2 days, Calculator Max every 5 days. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 数字化工厂kmf | Calculator Max |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (14 ratings)](https://appshunter.io/ios/app/calculator-max-extremely-fast/id6448638438/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 32 MB | 90 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [福建恒劲科技有限公司](https://appshunter.io/developer/1587116445) | [成都仓墨科技有限公司](https://appshunter.io/developer/1668641241) |

## What reviewers say

### 数字化工厂kmf

[App page](https://appshunter.io/ios/app/kmf/id1626243207)

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

**In-app purchases:** none


### Calculator Max

[App page](https://appshunter.io/ios/app/calculator-max-extremely-fast/id6448638438)

This app offers a fast and efficient calculator for everyday calculations. It provides a VIP membership for continuous access without recurring subscriptions, with options to manage renewals through Apple ID settings.

**Highlights:** Fast calculations, Scientific calculator functions, VIP membership, No recurring subscriptions, Easy renewal management

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Permanent purchase | $7.99 | one-time |


## Frequently asked questions

### Is 数字化工厂kmf free?

数字化工厂kmf is free to download, with no in-app purchases.

### Is Calculator Max free?

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

### Do 数字化工厂kmf or Calculator Max have ads?

Calculator Max shows ads; 数字化工厂kmf does not.

### Which is updated more often, 数字化工厂kmf or Calculator Max?

数字化工厂kmf ships an update every 2 days, and Calculator Max every 5 days. Most recently, 数字化工厂kmf was updated on October 1, 2026 and Calculator Max on September 30, 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.*