---
title: "Drill and Tap Tool - Thread Tapping & Through Hole — App Overview"
url: https://marlvel.ai/intel-report/reference/com-chewyapplications-drilltapmod
category: Reference
developer: Chewy Applications
platforms: ios
rating: 4.3 (30 ratings)
pricing: paid
report_level: overview
generated: 2026-04-24
last_verified: "2026-04-24T13:59:08.247Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** While the app offers specialized utility for machining calculations, recent user feedback indicates critical compatibility issues on modern iOS devices.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Reference |
| Rating | 4.3 ★ (30) |
| Pricing | paid |
| Platforms | iOS |
| Latest Version (iOS) | 4.0 |
| Developer | Chewy Applications |

<!-- SECTION: Summary -->
## What is Drill and Tap Tool - Thread Tapping & Through Hole?

Drill and Tap Tool is a reference utility designed for machinists and engineers to calculate precise drill sizes for thread tapping operations. It supports various thread standards, including UNC, UNF, UNEF, ISO Metric, and NPT, while allowing users to adjust for percentage depth of thread and through-hole clearance.

<!-- SECTION: Key Features -->
## Key Features

- **Multi-Standard Support**: Calculates drill sizes for US Standard (UNC, UNF, UNEF), ISO Metric, and National Pipe Thread (NPT) standards.
- **Variable Calculation**: Determines drill requirements based on thread type, tap size, percentage depth of thread, through-hole clearance, and operation type.
- **Universal Bit Sizing**: Provides results in Metric, Fractional Inch, and US Number/Letter drill bit sizes.
- **Accuracy Verification**: Automatically recalculates actual percentage-depth-of-thread and through-hole clearance for selected drill bit sizes.

<!-- SECTION: Target Audience -->
## Who is it for?

Machinists, engineers, and metalworkers who require accurate drill bit sizing for diverse thread types.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/drill-and-tap-tool-thread-tapping-through-hole/id421763062?uo=2)
- [Full Intelligence Report](https://marlvel.ai/intel-report/reference/com-chewyapplications-drilltapmod)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/intel-report/reference/com-chewyapplications-drilltapmod).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*