# Walter Machining Calculator vs RJ DataSMS

The clearest difference is update cadence: RJ DataSMS at every 3 months against Walter Machining Calculator's every 19 months. RJ DataSMS also leads on iOS requirement (16.0 vs 18.0). 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.

Walter Machining Calculator ships an update every 19 months, RJ DataSMS every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Walter Machining Calculator | RJ DataSMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (5 ratings)](https://appshunter.io/ios/app/walter-machining-calculator/id423564212/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 62.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 95 MB | 31 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Walter-AG](https://appshunter.io/developer/423564215) | [Student Agency, k. s.](https://appshunter.io/developer/706033018) |

## What reviewers say

### Walter Machining Calculator

[App page](https://appshunter.io/ios/app/walter-machining-calculator/id423564212)

Calculate machining time, power, torque, and cutting force for various operations. Compare existing tools with new ones to project potential savings.

**Highlights:** Calculate machining time, power, and torque, Determine cutting force and metal removal rate, Support for milling, drilling, boring, turning, and grooving, Thread tapping, forming, and milling calculations, Material selection for calculations, Savings calculator for tool comparison

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

**In-app purchases:** none


### RJ DataSMS

[App page](https://appshunter.io/ios/app/rj-datasms/id1488314121)

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

**In-app purchases:** none


## Frequently asked questions

### Is Walter Machining Calculator free?

Walter Machining Calculator is free to download, with no in-app purchases.

### Is RJ DataSMS free?

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

### Do Walter Machining Calculator or RJ DataSMS have ads?

Neither Walter Machining Calculator nor RJ DataSMS shows ads.

### Which is updated more often, Walter Machining Calculator or RJ DataSMS?

Walter Machining Calculator ships an update every 19 months, and RJ DataSMS every 3 months. Most recently, Walter Machining Calculator was updated on November 1, 2026 and RJ DataSMS on November 3, 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.*