Comparison

PSExampleApp vs Unit Converter For Engineers

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

Head to head
About

PSExampleApp

Features
Read full description

The PSExampleApp is a simple open-source application that guides a user to do a measurement with a PalmSens device to measure concentrations in a liquid sample. The app can be re-configured without code for use with (bio)sensors measuring a specific analyte using a linear calibration curve. The application provides clear instructions, so that the user follows a simple flow to connect to a device and run a measurement with just a few taps. The app’s default configuration is set for detection of Heavy Metals using ItalSens screen-printed-electrodes for heavy metal detection. It can be download from the app store and configured for your own need or serve as an example for your own app. The source code can be found at: https://github.com/PalmSens/PSExampleApp .

About

Unit Converter For Engineers

This app provides a comprehensive unit conversion tool specifically designed for engineers, offering specialized units not found in standard converters. It features offline functionality, fast search, and a clean interface, replacing the need for multiple reference materials.

Highlights
  • Specialized engineering units
  • Offline functionality
  • Fast search and instant conversion
  • Fraction input mode
  • Ad-free interface
  • Scientific notation support
Features
Read full description

Built for engineers who work with units most converters don’t have. No ads. No popups. No distractions. If you’ve ever opened PDFs, charts, or old handbooks to convert Rockwell hardness, wire gauge, HVAC airflow, radiation dose, water hardness, or torque units — this app replaces all of that. Units you usually can’t find in converter apps Material Hardness Rockwell (HRC, HRB, HRA), Vickers, Brinell, Knoop, Mohs, Shore Wire Gauge AWG, SWG, MCM, kcmil, diameter, cross-sectional area HVAC & Airflow CFM, ACH, BTU/h, tons of cooling, kW, airflow per area and per person Water Quality & Chemistry ppm, mg/L as CaCO₃, grains per gallon (US/UK), °dH, °fH, dKH, mmol/L, meq/L Radiation & Radioactivity Becquerel, Curie, Gray, rad Mechanical & Structural Torque, stress, density, pressure, moment of inertia (kg·m² ↔ slug·ft²) Built for real work environments • Works 100% offline in labs, plants, and job sites • Fast search and instant conversion • Scientific notation for precision work • Fraction input mode for field and construction use • Clean, engineer-friendly interface — no ads, ever This app replaces reference charts, calculators, handbooks, and repeated Google searches with one reliable tool in your pocket. Pricing 7-Day Free Trial $9.99/year full access $29.99 lifetime access Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://unitconvertx.github.io/docs/privacy.html

Screenshots

PSExampleApp4 screens
Unit Converter For Engineers4 screens

Verdict

The call

The clearest difference is in-app purchases: PSExampleApp at none against Unit Converter For Engineers's 2. PSExampleApp also leads on update cadence (daily vs every 9 days). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Unit Converter For Engineers sells 2 in-app purchases, starting at $9.99 per year. PSExampleApp asks for nothing beyond the download.

UpkeepUpdate frequency

PSExampleApp ships an update daily, Unit Converter For Engineers every 9 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
PSExampleApp versus Unit Converter For Engineers: the parameters behind the verdict, then further details
ParameterPSExampleAppUnit Converter For Engineers
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyDaily — betterEvery 9 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.216.2
Further details — not scored
Size131 MB5 MB
Age rating4+17+
DeveloperPalmSens BVAmanuel Abebaw

In-app purchases

None

PSExampleApp

No in-app purchases

2 purchases

Unit Converter For Engineers

Subscriptions1
  • Annual Subscription7 Days trial$9.991 Year
One-time1
  • Lifetime Access$29.99

Questions

Is PSExampleApp free?
PSExampleApp is free to download, with no in-app purchases.
Is Unit Converter For Engineers free?
Unit Converter For Engineers is free to download, with in-app purchases available.
Do PSExampleApp or Unit Converter For Engineers have ads?
Neither PSExampleApp nor Unit Converter For Engineers shows ads.
Which is updated more often, PSExampleApp or Unit Converter For Engineers?
PSExampleApp ships an update daily, and Unit Converter For Engineers every 9 days. Most recently, PSExampleApp was updated on November 7, 2026 and Unit Converter For Engineers on October 30, 2026.

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