Best Tap Drill Chart Apps

249+ iOS apps curated and reviewed

4.6 avg rating

12 free apps

Updated October 2026

Looking for free tap drill chart apps? 12 of our 249+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Tap Drill Chart Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Drill and Tap Tool - Thread Tapping & Through Hole	$1.99	4.3★ (30)	No	No	Aug 2026
2	Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions	$0.99	4.5★ (22)	No	No	Aug 2026
3	ThreadKing	Free	4.7★ (12)	No	No	Oct 2026
4	Tap & Drill Size Reference	$0.99	—	No	No	Aug 2026
5	Tap Drill Pocket	$2.99	—	No	No	Aug 2026
6	FSWizard	Free	4.6★ (47)	No	No	Aug 2026
7	Machinist Tap Drill Chart	Free	—	No	Yes	Aug 2026
8	Tap & Drill Pro	$2.99	—	No	No	Aug 2026

Top Picks for Tap Drill Chart

#1

Drill and Tap Tool - Thread Tapping & Through Hole by Chewy Applications

Editor's Choice

4.3(30 ratings)

$1.99

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 1

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 2

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 3

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 4

Drill and Tap Tool - Thread Tapping & Through Hole screenshot 5

Calculate the correct drill bit size for your tapping operations. Supports various thread types and inch/metric measurements. Provides precise calculations for depth of thread and clearance.

#2

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions by Chewy Applications

Strong Contender

4.5(22 ratings)

$0.99

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 1

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 2

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 3

Drill Size Charts - Drill bit size tables to show US Number / Letter and Fraction Inch sizes in Decimal Inch and Metric Conversions screenshot 4

Access comprehensive drill bit size charts with ease. Quickly find conversions between US Number/Letter, Fractional-Inch, and Metric sizes. A handy reference for professionals and students alike.

#3

ThreadKing by Motionics LLC

Ultimate Reference for Threads

Worth Considering

📊 Productivity

4.7(12 ratings)

Free

ThreadKing screenshot 1

ThreadKing screenshot 2

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ThreadKing screenshot 5

ThreadKing screenshot 6

This app serves as a comprehensive reference and calculator for various thread types and dimensions. It provides detailed information on Metric and UN threads, including tap sizes and thread calculations for cutting and forming taps. Users can also find drill size charts and calculate RPM and feed rates for different materials.

More Tap Drill Chart apps to explore

Tap & Drill Size Reference

Tap & Drill Size Reference

Tap & Drill Size Reference

UNC UNF Metric Thread Chart

Tap Drill Pocket

Tap Drill Pocket

Tap Drill Pocket

Thread Chart for Machinists

CNC Machinist Calculator

This app is a comprehensive calculator for CNC machinists, simplifying the calculation of speeds and feeds for milling, drilling, and turning operations. It automatically suggests optimal cutting conditions based on material choices and supports advanced features like chip thinning and HSM machining.

Milling, drilling, and turning speeds and feedsAutomatic cutting condition suggestionsChip thinning and HSM support

📊 Productivity

Machinist Tap Drill Chart

Machinist Tap Drill Chart

Machinist Tap Drill Chart

Thread, screw & hole sizes

Tap & Drill Pro

Tap & Drill Pro

Tap & Drill Pro

Thread & Drill Calculator

Drill Speed Calculator

Easily calculate optimal drill speeds for various drill bits and materials with an intuitive icon-based interface. This app automatically adjusts options based on your selections and remembers your progress.

Intuitive icon-based interfaceWide selection of drill bits and materialsAutomatic option adjustment

Thread Chart: Tap Drill & CNC

Thread Chart: Tap Drill & CNC

Thread Chart: Tap Drill & CNC

Thread Sizes & Tap Drills

Drill Bit Matcher

Drill Bit Matcher

Drill Bit Matcher

Find Bit & Pilot Hole Size

Screw Size Drill Bit Chart

Screw Size Drill Bit Chart

Screw Size Drill Bit Chart

Bolt, Gauge, Tap & Pilot Hole

Tap Counter Pulsar Median

Tap Counter Pulsar Median

Tap Counter Pulsar Median

Simple Tap Counter

📊 Productivity

YAMAWA Product Search/Tap Calc

YAMAWA Product Search/Tap Calc

YAMAWA Product Search/Tap Calc

by YAMAWA International Co., Ltd.

Drill with Lantern

Drill with Lantern

Drill with Lantern

Drilling productivity software

📊 Productivity

Drill Bit Converter

Drill Bit Converter

Drill Bit Converter

by Dohmann Engineering Services

Thread Pitch Gauge - Tap Drill

Thread Pitch Gauge - Tap Drill

Thread Pitch Gauge - Tap Drill

Bolt & Screw Identifier Tool

Tap Count ~Increase/decrease~

Tap Count ~Increase/decrease~

Tap Count ~Increase/decrease~

A simple app for counting

Drilling Hydraulics (Basic)

Drilling Hydraulics (Basic)

Drilling Hydraulics (Basic)

Formulas and Calculations

📊 Productivity

by EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik fuer Praezisionswerkzeuge

📊 Productivity

FAQ about Tap Drill Chart

What are the best tap drill chart apps for iPhone?

Drill and Tap Tool - Thread Tapping & Through Hole tops our tap drill chart apps ranking as of October 2026, with a 4.3-star average from 30 App Store ratings, and it's priced at $1.99.

Are there free tap drill chart apps for iPhone?

Yes — 12 of the top tap drill chart apps we rank are free to download, including ThreadKing and FSWizard.

Does Drill and Tap Tool - Thread Tapping & Through Hole have ads or in-app purchases?

Drill and Tap Tool - Thread Tapping & Through Hole has no ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many tap drill chart apps are on the App Store?

We track 249+ tap drill chart apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.