Best Ruler Fish Apps

250+ iOS apps curated and reviewed

3.6 avg rating

19 free apps

Updated October 2026

Whether you're new to ruler fish or looking for an upgrade, our curated collection of 250+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Ruler Fish Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Epic Ruler	Free	1.0★ (4)	No	No	Aug 2026
2	Ruler •	Free	4.2★ (419)	Yes	No	Oct 2026
3	Fish Ruler Size Measure Catch	$3.99	—	No	No	Sep 2026
4	WetRuler	Free	5.0★ (1)	No	No	May 2026
5	Ruler - Accurate Ruler	Free	2.6★ (40)	No	No	Oct 2026
6	Ruler / Measuring Tape	Free	4.4★ (236)	No	No	Oct 2026
7	Ruler+ Utility	Free	3.0★ (2)	Yes	Yes	Sep 2026
8	Fish Masters Live: Tournaments	Free	4.6★ (217)	No	Yes	Oct 2026

Top Picks for Ruler Fish

#1

Epic Ruler by Chih-Hao Chen

A classic ruler

Editor's Choice

1.0(4 ratings)

FreeAds

Epic Ruler screenshot 1

Transform your smartphone into a portable measuring tool. Accurately measure lengths in both inches and centimeters directly from your device.

#2

Ruler • by Matrix Software Co.

Includes Camera (AR) Ruler

Strong Contender

4.2😞(419 ratings)

FreeAds

Ruler • screenshot 1

Ruler • screenshot 2

Ruler • screenshot 3

Ruler • screenshot 4

Ruler • screenshot 5

Ruler • screenshot 6

Measure objects and distances with an on-screen ruler and augmented reality. Supports inches and centimeters, with features for linear sizes, angles, area, volume, and more. Save your measurements for later use.

What We Love

👍 Basic caliper and spirit level included
✅ Option to opt-out of data selling/sharing
👌 Accurate measurements (Arabic review)

Room to Improve

📏 Inaccurate measurements
💥 Frequent app crashes
💸 Limited free functionality (5" limit)
🚫 Cannot switch to metric (cm)
🤷 Unclear AR mode usage
❌ No save or print option
↩️ Unable to exit AR mode
❓ No instructions on how to use
📱 Assumes a single phone size
📉 Ruler markings are incorrect (10ths instead of 16ths)
👎 Generally poor user experience

#3

Fish Ruler Size Measure Catch by Netflowers Inc.

AR Tape for Bass Trout Pike

Worth Considering

0.0(0 ratings)

$3.99

Fish Ruler Size Measure Catch screenshot 1

Fish Ruler Size Measure Catch screenshot 2

Fish Ruler Size Measure Catch screenshot 3

Fish Ruler Size Measure Catch screenshot 4

Fish Ruler Size Measure Catch screenshot 5

Fish Ruler Size Measure Catch screenshot 6

More Ruler Fish apps to explore

AR app for Weighing Fish

This augmented reality application measures and weighs fish using your device's camera. Simply place your catch on a surface, select the fish type, and the app will estimate its length and approximate weight. It also records a photo of your catch with the measurements displayed.

AR measurement gridFish type selectionApproximate weight and length calculation

Ruler - Accurate Ruler

Ruler - Accurate Ruler

Ruler - Accurate Ruler

This application provides a precise measurement tool by rendering according to your device's screen width specifications. It has been tested on a wide range of Apple devices to ensure accuracy for your measuring needs.

Accurate screen-based renderingDevice-specific calibrationWide device compatibility

📊 Productivity

Ruler / Measuring Tape

Ruler / Measuring Tape

Ruler / Measuring Tape

Measure on screen, AR & paper

Measure objects using your device's screen, augmented reality, or by printing a ruler. Offers three distinct methods for on-demand measurement without physical tools.

Measure against screenAugmented reality measurementPrintable ruler via AirPrint

by Kyungjin Lee

Transform your smartphone into a versatile measuring tool. Instantly measure the length of objects using your phone's screen, with options for fixed or scroll modes. Save your measurements and choose between centimeters or inches for precise results.

Smartphone rulerFixed and scroll measurement modesSave measurements

free with in-app purchases

Fish Masters Live: Tournaments

Fish Masters Live: Tournaments

Fish Masters Live: Tournaments

Fishing Contests, Measure & ID

Compete in weekly fishing tournaments and log your catches with ease. Track your progress on live leaderboards and build a personal fishing history with detailed logs. Features AI species detection and fast submission tools.

Weekly fishing tournamentsLive leaderboards and standingsFast catch logging

free with in-app purchases

Tape Measure & Ruler Арр

Tape Measure & Ruler Арр

Tape Measure & Ruler Арр

Multifunctional Ruler・Level

This app functions as a digital measuring tool, allowing you to measure objects and distances with accuracy. It also enables you to create sketches with text annotations and share your measurements and designs.

Digital ruler and measuring tapeImperial and Metric unitsRangefinder for distance measurement

free with in-app purchases

CatchVault: Fish Log & Measure

CatchVault: Fish Log & Measure

CatchVault: Fish Log & Measure

Fish ID, Measure & Catch Log

Log your fishing catches with AI species identification and automatic length measurement on compatible devices. Discover new fishing spots, check detailed weather forecasts, and access species-specific information and regulations. An AI assistant provides personalized fishing advice.

AI species identificationAutomatic length measurement (LiDAR)Fishing spot discovery map

free with in-app purchases

Ruler Professional

Ruler Professional

Ruler Professional

by KBIC International Ltd

Transform your iOS device into a versatile measuring tool. Accurately measure lengths in both centimeters and inches using on-screen markers. Ideal for quick, on-the-go measurements.

Device as a rulerMetric and imperial unitsAdjustable measurement markers

Ruler - Screen accurate ruler

Ruler - Screen accurate ruler

Ruler - Screen accurate ruler

measuring app and ruler app

Transform your device into a precise measuring tool. Measure objects, distances, and spaces with fingertip accuracy. Offers real-time results in both metric and imperial units, with professional calibration for your specific device.

Instant touch measurementTwo-finger measurementReal-time results (cm/inches)

Ruler - CM, MM, Inches

Ruler - CM, MM, Inches

Ruler - CM, MM, Inches

CM, MM, In. Measure Anything.

Measure lengths, widths, and diagonals accurately using your phone. Switch between metric and imperial units, and utilize flexible starting points for precise measurements in any direction. Features auto-calibration for minimal error and a screen lock to preserve readings.

Multi-mode measurement (CM, MM, Inches, Fractions)Flexible starting pointsFull-direction measurement (horizontal, vertical, diagonal)

free with in-app purchases

Ruler - Screen Measure Tool

Ruler - Screen Measure Tool

Ruler - Screen Measure Tool

Measure anything

Ruler: CM, MM & Inches

Ruler: CM, MM & Inches

Ruler: CM, MM & Inches

Measure Length & Caliper Tool

This app provides a highly accurate, actual-size ruler that adapts to any screen. It offers dual-edge measurement, a precision caliper mode, and universal calibration for reliable real-world measurements. It functions offline and is designed for various devices.

Actual-size accuracy on any screenDual-edge metric and imperial scalesPrecision caliper mode for thickness

free with in-app purchases

Caudal: Measure Fish by Photo

Caudal: Measure Fish by Photo

Caudal: Measure Fish by Photo

Length, weight, no tape needed

Weigh In: Fish Length Tracker

Weigh In: Fish Length Tracker

Weigh In: Fish Length Tracker

Capture Length, Track Catches

Easily measure fish using your phone's camera for an estimated weight calculation. Capture your trophy catches and fishing moments with this tool.

Camera-based fish measurementEstimated weight calculationTrack trophy catches

Learn About Types Of Fish

Learn to identify various fish species with this educational app. It offers audio pronunciation, study modes, quizzes, and bookmarking to help users memorize fish types effectively. Track your progress through chapters and overall learning.

Audio pronunciation in EnglishText-to-speech engineQuizzes for learning

free with in-app purchases

Fish Planet Calendar

Fish Planet Calendar

Fish Planet Calendar

Fishing forecast

This app provides a fishing forecast, predicting the probability of a successful catch for various fish species. Users can customize forecasts by selecting specific fish and locations, and receive daily notifications on their mobile devices and connected gadgets. The forecast is based on a sophisticated mathematical model.

Daily fishing success probabilityCustomizable fish species selectionLocation-specific forecasts

free with in-app purchases

Snap. Scan. Know Your Catch.

Instantly estimate the length, girth, and weight of your fish by taking a photo. The app can also identify the species, eliminating the need for manual measurements or rulers. Save your catches to build a personal log of your fishing success.

Estimate fish lengthEstimate fish girthEstimate fish weight

FAQ about Ruler Fish

What are the best ruler fish apps for iPhone?

Epic Ruler tops our ruler fish apps ranking as of October 2026, with a 1.0-star average from 4 App Store ratings, and it's free to download.

Are there free ruler fish apps for iPhone?

Yes — 19 of the top ruler fish apps we rank are free to download, including Epic Ruler and Ruler •.

Does Epic Ruler have ads or in-app purchases?

Epic Ruler has no ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many ruler fish apps are on the App Store?

We track 250+ ruler fish apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.