Unit Convert Master vs Plimsoll
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Convert Master
Easily convert between over 100 measurement units across 15 categories. This app offers a user-friendly interface, offline functionality, and a history of your conversions for quick access. Ideal for students, professionals, and everyday users needing precise calculations.
- 15+ conversion categories
- 100+ measurement units
- Intuitive interface with themes
- Custom keyboard for input
- Conversion history with search
- Offline functionality
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Transform complex unit conversions into simple tasks with our comprehensive Unit Converter app. Whether you're a student, professional, scientist, engineer, traveler, or home cook, this app has you covered with precise conversions across multiple categories. FEATURES: - 15+ conversion categories including Length, Mass, Temperature, Time, Volume, Area, Speed, Energy, Pressure, Angle, Data Size, Power, Frequency, Radiation, Fuel Economy, and Cooking - 100+ measurement units from common everyday measures to specialized scientific units - Beautiful, intuitive interface with customizable themes - Custom keyboard for easy and accurate input - Swap button to quickly reverse conversion direction - Comprehensive conversion history with search functionality - Copy results with a single tap - Works offline - no internet required CONVERSION CATEGORIES: - Length: meters, feet, inches, miles, light years, and more - Mass: kilograms, pounds, ounces, tons, and specialized units - Temperature: Celsius, Fahrenheit, Kelvin - Time: seconds to years and everything in between - Volume: liters, gallons, cubic meters, and cooking measurements - Area: square meters, acres, square feet, even Japanese tatami - Speed: mph, km/h, m/s, knots, speed of light, and sound - Energy: joules, calories, kilowatt-hours, BTU - Pressure: pascals, bars, psi, atmospheres - Angle: degrees, radians, minutes of arc - Data: bytes, kilobytes up to petabytes - Power: watts, horsepower, BTU/hour - Frequency: hertz, rpm, cycles per second - Radiation: becquerels, curies, grays, rads - Fuel Economy: mpg, km/L, L/100km - Cooking: all essential kitchen measurements
Plimsoll
This visual planner helps you manage tasks by respecting your mental capacity. It uses a unique "Plimsoll Line" to visualize your workload, preventing overwhelm and anxiety. Features include mood tracking, stress recovery tools, and integration with your existing reminders.
- Visual workload indicator
- Mood tracking widget
- Stress recovery screen
- Integrates with Reminders
- ADHD-friendly design
- No overdue badges
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**Stop sinking under your to-do list.** Every ship has a "Plimsoll Line", a mark on its hull that indicates the maximum safe load. If you load cargo past that line, the ship sinks. *You are no different.* You have a limit to how much mental "cargo" you can carry in a day. Yet, standard to-do lists encourage you to add infinite tasks until you drown in anxiety. Plimsoll is a calm, visual planner designed to help you respect your capacity. **WHY IT WORKS** *Visual Limits:* Watch the water line rise as you add tasks. When it hits the mark, stop. *Immediate small action:* Tap on the widget to record your mood without having to see the tasks. No guilt. Or open the "Pause and Breathe" screen from the app to recover from stress. *Integrates with Reminders app:* Keep using Reminders, Plimsoll enhances your existing tasks. *ADHD Friendly:* No red "overdue" badges. No flashing lights. Just a safe harbor for your thoughts. **100% FREE. NO PAYWALLS.** Tired of "free" mental health apps that lock their best features behind expensive monthly subscriptions? Plimsoll is fully unlocked from the moment you download it. There are no ads, no trackers, and no paywalls. If the app helps you navigate your day, there is an optional "Tip Jar" inside where you can buy me a coffee or give me a push to keep development going. **A NOTE FROM THE DEVELOPER** I built Plimsoll because standard planners gave me anxiety. I wanted a tool that didn't yell at me, but instead helped me stay afloat. I built this as a solo passion project to help others find that same peace. If you are tired of productivity apps that make you feel less productive, welcome aboard.
Screenshots
Verdict
The clearest difference is in-app purchases: Unit Convert Master at none against Plimsoll's 3. Unit Convert Master also leads on iOS requirement (18.2 vs 26.0). Plimsoll's advantage is ads (none vs shown) and update cadence (every 6 days vs every 4 months). On price, rating, ratings volume 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
Both are free to download. Plimsoll sells 3 one-off in-app purchases. Unit Convert Master asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Unit Convert Master against 5.0 for Plimsoll. Both are backed by a comparable volume of ratings — 2 and 4 respectively.
Unit Convert Master ships an update every 4 months, Plimsoll every 6 days. Both last shipped on October 30, 2026.
| Parameter | Unit Convert Master | Plimsoll |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (4 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 | 4 — better |
| Update frequency | Every 4 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.2 — better | 26.0 |
| Further details — not scored | ||
| Size | 4 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Mizuki Hoshida | Factory 620 LLC |
Customer experience
Unit Convert Master
Plimsoll
In-app purchases
Unit Convert Master
No in-app purchases
Plimsoll
- Buy me a coffee$1.99
- First Mate$4.99
- Golden Captain$19.99
Questions
Is Unit Convert Master free?
Is Plimsoll free?
Which has better reviews, Unit Convert Master or Plimsoll?
Do Unit Convert Master or Plimsoll have ads?
Which is updated more often, Unit Convert Master or Plimsoll?
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