# Screw Flight Pro vs TAC

The clearest difference is price: TAC at Free against Screw Flight Pro's $3.99. TAC also leads on update cadence (every 3 months vs every 41 months) and iOS requirement (12.4 vs 16.1). On ads, in-app purchases and device support there is nothing between them.

TAC is free to download; Screw Flight Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Screw Flight Pro ships an update every 41 months, TAC every 3 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Screw Flight Pro | TAC |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 1 MB | 10 MB |
| Requires iOS | 16.1 | **12.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Zewas GmbH](https://appshunter.io/developer/1468908840) |

## What reviewers say

### Screw Flight Pro

[App page](https://appshunter.io/ios/app/screw-flight-pro/id1484488782)

Calculate screw flight development for fabrication. This app provides flat pattern sizes for cutting blank plates, essential for screw conveyors and ribbon blenders. It helps determine raw cutting plate dimensions for various process equipment.

**Highlights:** Calculate screw flight development, Flat pattern size for cutting blank plates, Input outside & inside diameter, pitch, thickness, Calculate weight of flight using specific gravity, Determine raw cutting plate size, Includes radial cut element

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

**In-app purchases:** none


### TAC

[App page](https://appshunter.io/ios/app/tac-saw-blade-reader/id6443866439)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Screw Flight Pro free?

Screw Flight Pro costs $3.99, with no in-app purchases.

### Is TAC free?

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

### Do Screw Flight Pro or TAC have ads?

Neither Screw Flight Pro nor TAC shows ads.

### Which is updated more often, Screw Flight Pro or TAC?

Screw Flight Pro ships an update every 41 months, and TAC every 3 months. Most recently, Screw Flight Pro was updated on November 3, 2026 and TAC on November 7, 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.*