CONVERT UNITS vs Plumly
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
Plumly
Effortlessly capture and organize events, places, and ideas from photos, voice, or pasted links. This app intelligently parses information and resurfaces saved items when relevant, acting as a personal memory assistant.
- Capture flyers with camera
- Voice-to-event creation
- Parse links from social media and maps
- Intelligent resurfacing of saved items
- Music-based event recommendations
- Calendar integration
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Keep the places, plans and ideas you want to come back to in one place. Plumly turns links, text and photos into a personal library you can organize, revisit and share. CAPTURE WHAT MATTERS • Save a link, paste text, choose a photo or use voice capture. • Review interpreted details before saving an event, place or note. • Find your content in Saved and upcoming plans and reminders in Up Next. MAKE PLANS • Set and change reminders. • Add events to Apple Calendar when you choose. • Share plans and invite people to RSVP through a link. MAKE GUIDES YOUR OWN • Organize places, plans and links into guides. • Edit guide details and items, and keep your published guide up to date. • Publish to Explore or share by link. Unpublish when you choose. • Let people preview shared guides on the web without the app. DISCOVER AND CONNECT • Find guides using city and category filters. • Search public profiles and follow people you enjoy. • See who follows you and manage blocked accounts. • Report content or profiles from the app. START YOUR WAY Use core features as a guest. Sign in with Apple for account features, publishing and optional library backup and restore. New users start with an empty personal library. Guest saves transfer to an account only when you approve. Plumly is free. Some features require internet access and device permissions. Content interpretation uses remote AI processing; review extracted dates, times and locations before relying on them. Manage your profile and request account deletion in the app. Privacy Policy: https://plumly.app/privacy Terms: https://plumly.app/terms
Screenshots
Verdict
The clearest difference is in-app purchases: Plumly at none against CONVERT UNITS's 2. Plumly also leads on ads (none vs shown) and review sentiment (100% vs 76%). CONVERT UNITS's advantage is ratings volume (1.4K vs 4) and iOS requirement (15.0 vs 17.0). On price, update cadence 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. CONVERT UNITS sells 2 in-app purchases, starting at $0.99 per month. Plumly asks for nothing beyond the download.
Plumly holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CONVERT UNITS has 1.4K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 76% of CONVERT UNITS's written reviews are positive against 100% of Plumly's.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 16, 2026 and October 13, 2026 respectively.
| Parameter | CONVERT UNITS | Plumly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.4K ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 75.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.4K — better | 4 |
| Update frequency | Weekly | Weekly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 11 MB |
| Age rating | 4+ | 12+ |
| Developer | Adysseus | Cedarline Technologies LLC |
Customer experience
CONVERT UNITS
Plumly
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
Plumly
Not enough reviews yet to summarise bugs or requests.
In-app purchases
CONVERT UNITS
- Remove ads$0.991 Month
- Remove ads$19.99
Plumly
No in-app purchases
Questions
Is CONVERT UNITS free?
Is Plumly free?
Which has better reviews, CONVERT UNITS or Plumly?
Do CONVERT UNITS or Plumly have ads?
Which is updated more often, CONVERT UNITS or Plumly?
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