CONVERT UNITS vs Pipefitter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CONVERT UNITS
Easily convert between various units of measurement including length, weight, temperature, and currency. Features automatic currency updates, a vast selection of currencies, and customizable display options for accuracy and rounding. Optimized for multitasking on iPad and offers a beautiful dark design.
- Converts length, weight, speed, area, time, pressure, volume, power, fuel, temperature, data, and currency
- Automatic currency updates
- 160 currencies available
- Multitasking enabled for iPad
- Alphabetical quick links for units
- Customizable startup categories
- Adjustable accuracy and rounding
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160 currencies · 126 cryptocurrencies · 685 units across 72 categories CONVERT ANYWHERE, EVEN OFFLINE Convert units without an internet connection. Currency and crypto conversions use your saved rates offline; an internet connection is needed to refresh rates. • No Full Screen Ads • Find units quickly with search and an alphabetical index • Control precision with decimal places and significant figures • Choose your starting category and hide categories you don’t use • Personalize your colors with curated or custom themes, available with Premium Designed for iPhone and iPad, with Split View support Dark and light appearance support CONVERSION CATEGORIES Everyday conversions Length, weight, temperature, area, volume, speed, time, fuel economy, pace, data, data transfer rate, angle, shoe sizes, ring sizes, amount, image resolution, typography and blood sugar Engineering and mechanics Pressure, torque, force, energy, power, acceleration, angular acceleration, moment of inertia, density, specific volume, flow, mass flux density, surface tension, viscosity, kinematic viscosity and permeability Electricity and magnetism Current, voltage, resistance, charge, frequency, capacitance, inductance, conductance, electric field strength, electric resistivity, electric conductivity, magnetic flux, magnetic field strength, magnetic flux density, magnetomotive force, linear charge density, surface charge density, volume charge density, linear current density and surface current density Heat and temperature Temperature interval, thermal conductivity, specific heat capacity, heat density, heat flux density, heat transfer coefficient and thermal expansion Chemistry Molar concentration, molar mass and molar flow rate Light, sound and radiation Luminance, illumination, luminous intensity, sound, radiation, radioactivity and exposure Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://developer-yl.github.io/convert-units/privacy.html
Pipefitter
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PEMM Pipefitter Estimator Man-Hour Manual PEMM is a comprehensive pipefitter estimating app with builtin man-hour data. It empowers craftsmen, estimators, contractors, engineers, and owners alike with the means to quickly evaluate and conduct all manner of this work, wherever encountered. The app provides instant access to over 100,000 pipefitting man-hour units, covering all the common handling, joining, supporting, and testing activities, components, and pipelines, for both carbon-steel and alloy-steel piping. Three interactive radio-buttons [SIZE] [SCH] [MAT] provide access to the entire database. In conjunction with the builtin labor data, quantities and labor & material rates [QUAN] [LAB RATE] [MAT RATE] can be entered and/or changed at any time, for complete all-found estimates. As well, the entire labor database can be adjusted for productivity [PROD] at any time. The program initializes with a data set for [4”] [STD] [CS] piping at a productivity of [1.0] and a labor rate of [$100.00] and then alternative choices can be made as needed. For unusual or off-spec pipe, the SCH list can be cycled through for a close match. Norm Goodings (Author/Publisher) Email: normgoodings@me.com Web Site: pipefitter-estimator.com
Screenshots
Verdict
The clearest difference is price: CONVERT UNITS at Free against Pipefitter's $49.99. CONVERT UNITS also leads on update cadence (weekly vs every 2 months). Pipefitter's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement 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
CONVERT UNITS is free to download; Pipefitter costs $49.99 up front. CONVERT UNITS sells 2 in-app purchases, starting at $0.99 per month. Pipefitter asks for nothing beyond the download.
CONVERT UNITS ships an update weekly, Pipefitter every 2 months. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.
| Parameter | CONVERT UNITS | Pipefitter |
|---|---|---|
| Price | Free — better | $49.99 |
| Rating | 4.7 (1.4K ratings) — better | — |
| Positive reviews | 75.8% of reviews | — |
| Number of ratings | 1.4K — better | — |
| Update frequency | Weekly — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 22 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Adysseus | Norman Goodings |
Bugs and requests
CONVERT UNITS
Reported bugs
2 issues- App got stuck, required uninstall/reinstall to fix
- Navigation issues, unable to get back to home page
Requested features
2 requests- Option to convert between functions (length to volume)
- Remember last conversion settings for each category
Pipefitter
Not enough reviews yet to summarise bugs or requests.
In-app purchases
CONVERT UNITS
- Remove ads$0.991 Month
- Remove ads$19.99
Pipefitter
No in-app purchases
Questions
Is CONVERT UNITS free?
Is Pipefitter free?
Do CONVERT UNITS or Pipefitter have ads?
Which is updated more often, CONVERT UNITS or Pipefitter?
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