Comparison

Milton Roy Metering Pump Tools vs PipeDN

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Milton Roy Metering Pump Tools

This app assists pump users and process engineers with selecting and supporting metering pumps. It offers tools for pump calibration, material compatibility guidance for chemicals, and unit conversions for process specifications.

Highlights
  • Metering pump calibration calculator
  • Material compatibility data for chemicals
  • Unit conversion tool
  • Calibration history log
  • Pump selection assistance
Features
Read full description

Milton Roy Metering Pump Tools are designed to help pump users and process engineers with apps that aid in choosing a metering pump and support existing pumps in the field. This initial launch includes 3 tools: Metering Pump Calibration: Most metering pumps are installed with a calibration column with a scale in milliliters. With this tool, you can start the timer when the drawdown reaches the first mark, and stop it when it reaches any mark of your choosing. Then enter the amount of milliliters that were drawn down and the calculator provides the pumps flow rate. The application also maintains a history of the calibrations for your convenience. Material Compatibility: Metering pumps handle thousands of different chemicals, so deciding which pump material to select can be a problem. This tool provides data compiled from Milton Roy’s experience and a number of industry sources to give guidance. The final selection of materials is always the user’s responsibility since the pump supplier cannot always be sure of the properties of any chemical as supplied. Your chemical supplier should be able to assist. Unit Conversions: Specifications for processes can come from anywhere in the world, so units of measure can span a wide variety. This tool enables quick conversion for the most commonly used units. Additional tools are being developed. If you have any questions or have an idea for additional tools, contact Milton Roy at: info@miltonroy.com

About

PipeDN

Features
Read full description

Need to determine the pipe size for a new industrial project? Want to check the maximum recommended flow rate for an existing fluid line? PipeDN is the ultimate pocket tool for industry professionals. Quickly find the ideal Nominal Diameter (DN) or maximum operating flow rate using velocity limits based on practical, field-tested engineering standards. Beyond delivering the exact requirement, the app generates a smart reference table of neighboring commercial pipe sizes (larger and smaller). This gives you the comprehensive technical data to choose the best design alternative for your facility. Highlighted Features: • Calculation Modules: "Find Ideal DN" and "Find Max Flow". • Native support for multiple pipe materials and schedules. • Professional PDF Reports: Export a detailed calculation memory directly to PDF. Include specific pipeline TAGs for customized, ready-to-archive engineering results. • Custom Units: Fully adapt pressure, temperature, flow rate, and diameter unit sets to match your region's standard. • Embedded Physical Tables: The Steam module features built-in thermodynamic properties for precise dynamic density tracking. Supported Fluids & Applications: • Water & Condensate: Treated Water, Condensate (Pump Discharge, Pump Suction, Steam Trap Return). • Steam: Advanced sizing targeting Saturated Steam and Superheated Steam lines. • Process Gases: Combustion Air, Flammable & Non-Flammable Gases, N₂, O₂, LPG. • Compressed Air: Limits tailored for Main Lines and Secondary Branches. • Vacuum Systems (Manifolds, Separators, Blowers). • Pulp & Paper Industry Niche: Exclusive calculation module for Cellulose Pulp responding to various consistency levels (up to 6%), as well as comprehensive chemical recovery liquors (Black Liquor in 4 concentrations, Green Liquor, Lime Mud, Dregs, Filtrate, Alkalis, and Tall Oil Soap). • Common Chemicals: Sodium Hydroxide, Sulphuric Acid, Antifoams, and Lubricating Oils. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Milton Roy Metering Pump Tools1 screens
PipeDN4 screens

Verdict

The call

The clearest difference is in-app purchases: Milton Roy Metering Pump Tools at none against PipeDN's 3. Milton Roy Metering Pump Tools also leads on iOS requirement (9.0 vs 15.1). PipeDN's advantage is update cadence (every 3 weeks vs every 49 months). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PipeDN sells 3 in-app purchases, starting at $7.99 per month. Milton Roy Metering Pump Tools asks for nothing beyond the download.

UpkeepUpdate frequency

Milton Roy Metering Pump Tools ships an update every 49 months, PipeDN every 3 weeks. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
Milton Roy Metering Pump Tools versus PipeDN: the parameters behind the verdict, then further details
ParameterMilton Roy Metering Pump ToolsPipeDN
PriceFreeFree
Rating4.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 49 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.1
Further details — not scored
Size8 MB40 MB
Age rating4+4+
DeveloperMilton Roy LLCAQUILES DE LIMA

In-app purchases

None

Milton Roy Metering Pump Tools

No in-app purchases

3 purchases

PipeDN

Subscriptions2
  • PipeDN Pro$7.991 Month
  • PipeDN Pro$49.991 Year
One-time1
  • PipeDN Pro$79.99

Questions

Is Milton Roy Metering Pump Tools free?
Milton Roy Metering Pump Tools is free to download, with no in-app purchases.
Is PipeDN free?
PipeDN is free to download, with in-app purchases available.
Do Milton Roy Metering Pump Tools or PipeDN have ads?
Neither Milton Roy Metering Pump Tools nor PipeDN shows ads.
Which is updated more often, Milton Roy Metering Pump Tools or PipeDN?
Milton Roy Metering Pump Tools ships an update every 49 months, and PipeDN every 3 weeks. Most recently, Milton Roy Metering Pump Tools was updated on October 2, 2026 and PipeDN on October 5, 2026.

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