Best Onsight Flow Apps

171+ iOS apps curated and reviewed

4.2 avg rating

19 free apps

Updated October 2026

From beginner-friendly picks to power-user tools, our onsight flow list covers 171+ iPhone apps updated through October 2026. Compare ratings, prices, and screenshots in one place.

Compare top Onsight Flow Apps (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Onsight Flow	Free	—	No	No	May 2026
2	Topup Flow	Free	4.5★ (6.9K)	No	No	Oct 2026
3	Flow App.	Free	2.0★ (10)	No	No	Oct 2026
4	Pipe Flow Calculations	Free	—	No	No	May 2026
5	FlowVis	Free	—	No	No	May 2026
6	Flow Test Calculator	Free	4.1★ (63)	No	Yes	Oct 2026
7	Flow Conversions	Free	5.0★ (1)	No	No	May 2026
8	SHO-FLOW	Free	3.9★ (13)	No	No	Oct 2026

Top Picks for Onsight Flow

#1

Onsight Flow by Librestream Technologies Inc.

Editor's Choice

📊 Productivity

0.0(0 ratings)

Free

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#2

Topup Flow by Cable & Wireless Holdings, Inc.

Official Flow Topup App

Strong Contender

📊 Productivity

4.5😞(6.9K ratings)

Free

Topup Flow screenshot 1

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Topup Flow screenshot 6

Easily recharge any Flow phone or purchase plans with a credit/debit card or PayPal. Select a destination, choose an amount or plan, and enter payment details for a quick top-up.

What We Love

⭐ Excellent app
🚀 Easy to use

Room to Improve

🐛 App crashes frequently
💸 Overcharging and losing credit
🔍 Lacking functionality and information
🤖 Poor customer service
🔌 Unreliable connectivity

#3

Flow App. by Emida Inc.

Worth Considering

2.0(10 ratings)

Free

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This app enables authorized merchants to resell top-up services and products. It provides a platform for businesses to manage their inventory and sales of specific goods.

More Onsight Flow apps to explore

Pipe Flow Calculations

Pipe Flow Calculations

Pipe Flow Calculations

Fluid Flow Calculator

Flow Test Calculator

Flow Test Calculator

Flow Test Calculator

Calculate hydrant flow rates and determine maximum water system flow. This tool uses a standard variation of the Hazen-Williams formula for calculations. Imperial units are currently supported, with metric coming soon.

Hydrant flow rate calculationMaximum water system flow determinationHazen-Williams formula implementation

📊 Productivity

free with in-app purchases

Flow Conversions

Flow Conversions

Flow Conversions

Water flow conversions

Easily convert water flow rates between various units of measurement. This utility app provides a straightforward way to calculate and understand different flow rate values.

Calculate flow rateMultiple units of measureWater flow conversions

by Task Force Tips

This app assists firefighters in calculating water flow rates, pump discharge pressures, and nozzle reactions. It can be used with a Bluetooth flow meter or as a standalone calculator with established fire flow formulas. Educational videos on water flow are also included.

Calculate fire hose flow ratesDetermine pump discharge pressuresCalculate nozzle reaction

Fashion, home design and ideas

Discover endless inspiration for fashion, home design, and more. Save ideas to personalized boards, shop styles you love, and learn new skills. Unlock billions of ideas for everyday life.

Discover inspirationShop stylesLearn new things

free with in-app purchases

Open Channel Flow Lite

Open Channel Flow Lite

Open Channel Flow Lite

Open Channel Hydraulics

📊 Productivity

Pipe Flow Liquid Flow Rate

Pipe Flow Liquid Flow Rate

Pipe Flow Liquid Flow Rate

Find Flow, Friction Loss Calc

Calculate fluid flow rate in pipes, including friction and fitting losses, using accurate engineering equations. Features extensive databases for liquids, pipes, and fittings, with customizable units and reporting options.

Fluid flow rate calculationFriction and fitting loss calculationExtensive material and fluid databases

free with in-app purchases

by Insight Media City India Private Limited

Stream recorded shows from a premium Malayalam TV channel. Instantly access full episodes of popular comedy serials and other featured programs, organized by genre for easy searching.

Instant access to recorded showsFull-length comedy serial episodesDaily updates for popular programs

🎬 Entertainment

Uniform Flow Light

Uniform Flow Light

Uniform Flow Light

by YamaSoftPLanning,Ltd.

Calculate water channel flow parameters like surface width, area, and velocity. The free version supports circular and rectangular channel shapes.

Calculate water channel flow parametersSurface Width calculationArea of Water calculation

by iENGINEERING Corporation

This application helps engineers and designers evaluate the hydraulic flow capacity of various non-pressure sewer pipe types. It allows for comparisons between different pipe geometries and materials, including concrete, thermoplastic, and metal options.

Manning's Formula calculationCompare hydraulic flow capacityEvaluate pipe geometry alternatives

📊 Productivity

proudP: urine flow test

proudP: urine flow test

proudP: urine flow test

Men 40+ Is Your Flow Okay

This app allows men to discreetly measure their urine flow at home using their smartphone. It provides objective data and insights to help users understand their urinary health and prepare for conversations with their doctor.

At-home urine flow testingAcoustic AI measurementObjective data insights

free with in-app purchases

Flow Now-River Levels Widget

Flow Now-River Levels Widget

Flow Now-River Levels Widget

USGS river gauge CFS widget

Get live river flow readings directly on your iPhone's Home Screen. This app displays real-time cubic feet per second (CFS) data from USGS gauges, helping you decide when to hit the water.

Home Screen widget with live CFSThousands of gauges searchable by name or stateNearby gauge selection

by Kaup Shenoy Associates

Calculate fluid flow rates in pipes and conduits using orifice plates. Supports common industrial fluids and custom fluid properties, with adjustable units and orifice types. Ideal for engineers and designers.

Fluid flow rate computationSupports 15 common industrial fluidsCustom fluid property input and saving

Water Flow Calculators

Water Flow Calculators

Water Flow Calculators

This educational app provides calculations for water flow using friction loss, smooth nozzle, NFA, and Iowa formulas. It's designed for professionals and students needing quick and accurate fluid dynamics computations.

Friction loss calculationsSmooth nozzle calculationsNFA formula support

ESC Gas Flow Rate Calculator

ESC Gas Flow Rate Calculator

ESC Gas Flow Rate Calculator

Measure & calculate flow rates

Followers - Tracker Insight

Followers - Tracker Insight

Followers - Tracker Insight

Unfollowers & Reports

Gain insights into your Instagram follower activity with this powerful analysis tool. Track unfollowers, view reports, and understand your audience better. All data is stored locally for your privacy.

Follower analysisUnfollower trackingDetailed reports

🌐 Social Networking

FAQ about Onsight Flow

Are there free onsight flow apps for iPhone?

Yes — 19 of the top onsight flow apps we rank are free to download, including Onsight Flow and Topup Flow.

Does Onsight Flow have ads or in-app purchases?

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

How many onsight flow apps are on the App Store?

We track 171+ onsight flow apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.