Units Converter for Engineers vs Trial Alert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Units Converter for Engineers
This tool allows professionals and students to convert units and currencies using dimensional analysis. It supports a vast number of unit combinations and includes physical constants. Currency rates are updated monthly.
- Free-form unit conversion via dimensional analysis
- Supports over 300 single units
- Supports over 165 currencies with automatic updates
- Includes dozens of physical constants
- Identifies unit mismatches
- Glossary of available units
Read full descriptionHide full description
Units Converter is a free-form units conversion tool designed for professionals and students of science and engineering. This is the only Units and Currency conversion app you will ever need. It is based on fundamental principle of dimensional analysis which allows you to enter your unit in any form (instead of picking from a predefined list). This method therefore supports any number of combinations. For example: It can effortlessly convert Energy in ton-TNT (tTNT) to kg-km^2/hr^2. If there is a units mismatch, it will identify missing units. Plus dozens of physical constants such as speed of sound, speed of light, gravitation constant, etc. are built-in and can be retrieved by entering their symbol. Supports over 300 single units and over 165 currencies. Currency rates are automatically updated about once a month. Includes prices of gold (XAU), silver (XAG), platinum (XPT), etc. Help notes provide a detailed glossary of all units available. In free version, first text field is locked to a value of 1 and cannot be edited. Purchase 'Unlock all features' on the App Store to enable editing. Check it out.
Trial Alert
This app helps you manage free trials and subscriptions. Get timely reminders before trials end to avoid unwanted charges. Easily track active subscriptions and their remaining days.
- Track subscription trials
- Receive expiry reminders
- Add trials quickly
- Swipe to remove trials
- View active trials
- Monitor remaining days
Read full descriptionHide full description
Never let free trials turn into unwanted charges again! Trial Alert is your smart companion for tracking and managing all your subscription trials before they start billing. Stay in control of your subscriptions with timely reminders that notify you before free trials end. No more surprise charges or forgotten cancellations - Trial Alert keeps you one step ahead. Simple and intuitive tracking lets you: - Add trials in seconds with just the app name and start date - Get notifications before trials expire - Swipe to remove completed or canceled trials - See all your active trials at a glance - Track the remaining days for each subscription Perfect for anyone trying new apps, services, or digital subscriptions. Whether you're testing streaming services, productivity apps, or fitness subscriptions, Trial Alert helps you avoid unwanted charges. Download now and take control of your subscription trials today! Privacy Policy: https://sites.google.com/view/trialalert/privacy-policy Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
Units Converter for Engineers and Trial Alert both sit at 3.0 stars, but that hides the real split: 50% of Units Converter for Engineers's written reviews are positive against 0% of Trial Alert's. Trial Alert's advantage is in-app purchases (none vs 2) and update cadence (every 3 days vs every 5 weeks). On price, rating, ratings volume and ads 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
Both are free to download. Units Converter for Engineers sells 2 one-off in-app purchases. Trial Alert asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 3.0 for Units Converter for Engineers against 3.0 for Trial Alert. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews are what separate them: 50% of Units Converter for Engineers's written reviews are positive against 0% of Trial Alert's.
Units Converter for Engineers ships an update every 5 weeks, Trial Alert every 3 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | Units Converter for Engineers | Trial Alert |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 3.0 (1 ratings) |
| Positive reviews | 50.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 5 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Lucy Enterprises | Benjamin Rhodes-Kropf |
Customer experience
Units Converter for Engineers
Trial Alert
In-app purchases
Units Converter for Engineers
- Unlock all features$0.99
- Remove ads$1.99
Trial Alert
No in-app purchases
Questions
Is Units Converter for Engineers free?
Is Trial Alert free?
Which has better reviews, Units Converter for Engineers or Trial Alert?
Do Units Converter for Engineers or Trial Alert have ads?
Which is updated more often, Units Converter for Engineers or Trial Alert?
Other comparisons
