# Thread Calculator vs Vacation Flow

The clearest difference is ads: Vacation Flow at none against Thread Calculator's shown. Vacation Flow also leads on update cadence (monthly vs every 18 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Thread Calculator ships an update every 18 months, Vacation Flow monthly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Thread Calculator | Vacation Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Ad-supported | — |
| Size | 25 MB | 39 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) | [Andrej Agovski](https://appshunter.io/developer/1801556301) |

## What reviewers say

### Thread Calculator

[App page](https://appshunter.io/ios/app/thread-calculator/id1559560290)

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

**Highlights:** Thread cutting calculator for multiple units, Cold forming calculator, Thread repair calculator, Tap hole and bolt diameter calculation, Saves time compared to tables

**Features:** macOS Compatibility

**In-app purchases:** none


### Vacation Flow

[App page](https://appshunter.io/ios/app/vacation-flow/id6779619778)

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

**In-app purchases:** none


## Frequently asked questions

### Is Thread Calculator free?

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

### Is Vacation Flow free?

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

### Do Thread Calculator or Vacation Flow have ads?

Thread Calculator shows ads; Vacation Flow does not.

### Which is updated more often, Thread Calculator or Vacation Flow?

Thread Calculator ships an update every 18 months, and Vacation Flow monthly. Most recently, Thread Calculator was updated on November 3, 2026 and Vacation Flow on October 31, 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.*