Comparison

Unit Converter Watch vs Cartly+

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

Head to head
About

Unit Converter Watch

This watch application facilitates unit conversions for various measurements including length, temperature, weight, volume, area, and speed. Navigate through different conversion types by swiping and easily select units or input values for quick calculations directly on your wrist.

Highlights
  • Converts length, temperature, weight, volume, area, and speed
  • Designed for Apple Watch convenience
  • Swipe navigation between conversion types
  • Easy unit selection and value input
  • Simple and intuitive interface
Features
Read full description

This watch app converts units for length, temperature, weight/mass, volume, area, and speed with the convenience of the Apple Watch. Simply swipe left or right to see each section of the app. Tap one of the unit buttons on the top left to bring up a picker to change the units. Then tap the ‘X’ to close the picker view and enter the measurement you want to convert. It is that simple.

About

Cartly+

Easily manage household shopping with a shared list that updates in real-time. Coordinate with family or roommates through built-in chat and receive smart notifications for added or checked-off items. Enjoy a clean, fast, and distraction-free design for effortless grocery planning.

Highlights
  • Real-time shared lists
  • Built-in household chat
  • Smart notifications
  • Organize shopping lists
  • Fast, distraction-free design
  • Multiple lists (Premium)
Features
Read full description

Less “did you get milk?” More shopping together. Cartly+ brings your household’s shopping lists, conversations and meal plans into one place. Add what you need, coordinate with your people and see what is still left to buy. For couples, families, roommates and anyone sharing the shopping. TWO WAYS TO KEEP YOUR LIST Keep an ongoing Main list for things you need without choosing a date. Use By date to organise a specific shopping trip. Clear To buy and Done sections make it easy to follow your progress and undo an accidental check. SHOP TOGETHER Invite your household and keep groceries, quantities, categories and notes in sync while connected. Someone adds an item at home. Someone else checks it off at the shop. KEEP THE CONVERSATION CLOSE Household chat keeps questions and last-minute changes alongside your shopping. Ask which milk to get or let everyone know you are heading to the store. PLAN MEALS, THEN ADD THE INGREDIENTS Save your household’s favourite recipes and plan meals for the week. Adjust servings, select the ingredients you need and add them to a shopping date. Leave out what is already in your cupboard. CONNECT YOUR AI ASSISTANT Connect a supported external AI assistant to read and update your shopping list. Ask it for dinner ideas, then tell it to add the ingredients to Cartly. Try: “Add spicy salmon rice bowl ingredients to my Cartly shopping list.” AI assistant connections are included in Free. Setup and a compatible assistant are required. Availability and external service terms vary. TAKE YOUR LIST WITH YOU Use Cartly+ on your phone or in your browser. On Apple Watch, browse, add and check off items with your paired iPhone connected. Switch between Main and today’s list on your watch and widgets. USEFUL FOR FREE • Membership in up to 2 households • Up to 50 shopping items per date, including checked items • Up to 50 unchecked items in Main list • Household chat and shared shopping • 5 saved recipes per household • Meal planning • AI assistant connections MORE ROOM WITH PREMIUM Upgrade for unlimited household memberships, shopping items and saved recipes, plus an ad-free experience. Import recipes from supported public websites and translate recipes, with daily usage limits. LISTS THAT STAY TIDY Main list keeps unchecked items until you remove them. Checked items are automatically removed after 30 days. By date items are removed more than 30 days after their shopping date, including unchecked items. An account and internet connection are required for shared updates. Apple Watch requires a compatible paired iPhone. Premium pricing and subscription terms are shown in the app. Privacy: https://cartly.plus/privacy Terms: https://cartly.plus/terms Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Cartly+4 screens

Verdict

The call

The clearest difference is price: Cartly+ at Free against Unit Converter Watch's $1.99. Cartly+ also leads on update cadence (every 2 weeks vs every 38 months). Unit Converter Watch's advantage is rating (4.0 vs 2.0) and in-app purchases (none vs 2). On 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

CostPrice · In-app purchases · Ads · Monetization

Cartly+ is free to download; Unit Converter Watch costs $1.99 up front. Cartly+ sells 2 in-app purchases, starting at $4.99 per month. Unit Converter Watch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Unit Converter Watch holds the better App Store score, 4.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 33% of Unit Converter Watch's written reviews are positive against 0% of Cartly+'s.

UpkeepUpdate frequency

Unit Converter Watch ships an update every 38 months, Cartly+ every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 2 level
Unit Converter Watch versus Cartly+: the parameters behind the verdict, then further details
ParameterUnit Converter WatchCartly+
Price$1.99Free — better
Rating4.0 (1 ratings) — better2.0 (1 ratings)
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings11
Update frequencyEvery 38 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS13.0 — better15.0
Further details — not scored
Size2 MB48 MB
Age rating4+4+
DeveloperPortumnusS10 Solutions OÜ

Customer experience

Unit Converter Watch

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

Cartly+

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Unit Converter Watch

No in-app purchases

2 purchases

Cartly+

Subscriptions2
  • Cartly+ Premium Monthly$4.991 Month
  • Cartly+ Premium Yearly7 Days trial$39.991 Year

Questions

Is Unit Converter Watch free?
Unit Converter Watch costs $1.99, with no in-app purchases.
Is Cartly+ free?
Cartly+ is free to download, with in-app purchases available.
Which has better reviews, Unit Converter Watch or Cartly+?
Unit Converter Watch is rated higher. Unit Converter Watch averages 4.0 out of 5 from 1 ratings, while Cartly+ averages 2.0 from 1 ratings.
Do Unit Converter Watch or Cartly+ have ads?
Cartly+ shows ads; Unit Converter Watch does not.
Which is updated more often, Unit Converter Watch or Cartly+?
Unit Converter Watch ships an update every 38 months, and Cartly+ every 2 weeks. Most recently, Unit Converter Watch was updated on November 3, 2026 and Cartly+ on October 30, 2026.

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