Comparison

Units vs Subscriptionstrack

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

Head to head
About

Units

Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.

Highlights
  • Hundreds of units across 43 categories
  • Daily updated currency exchange rates
  • Hide unused units
  • Reorder units and categories
  • Universal app support (iPhone, iPod touch, iPad)
Features
Read full description

Units is the fast, friendly unit converter. Type a number into any unit and instantly see it in every other one, all on a single screen. There's no picking what to convert from and to, no digging through menus, and no ads. With more than 800 units across 43 categories, Units covers everyday conversions like length, weight, volume and temperature, and the ones you need less often, from torque and fuel consumption to data rates, shoe sizes and musical notes. SEE EVERYTHING AT ONCE • Enter a value in any unit and every other unit in the category updates as you type • A keypad made for numbers, so the decimal point is always right where you need it CURRENCY • Convert between more than 160 currencies • Exchange rates updated every day MAKE IT YOURS • Hide the units you never use, so the ones you need are always in view • Reorder units and categories so your favorites come first • Switch on a two-column layout to see even more at a glance • Leave a tip to unlock a collection of alternative app icons MADE FOR YOUR DEVICES • Designed for iPhone and iPad, with your categories and conversion side by side on larger screens • Makes full use of iPhone Duo, whether it's open or closed • Handoff picks up a conversion where you left off on another device • Supports Dark Mode and Dynamic Type Units has been converting since 2008, and is lovingly made in Scotland.

About

Subscriptionstrack

Features
Read full description

Stop losing money to forgotten subscriptions. The average person underestimates their subscription spending by 2.5x. SubTrack helps you see the full picture — beautifully. SubTrack is a privacy-first subscription tracker designed to help you take control of every recurring charge. No bank login required. No complicated setup. Just add your subscriptions and instantly see what you're really paying. SEE YOUR SPENDING CLEARLY Track all your subscriptions in one clean dashboard. See your total monthly and yearly costs at a glance, with a visual progress bar showing exactly where you are in each billing cycle and how many days until your next charge. SPENDING INSIGHTS THAT MATTER Beautiful charts break down your spending distribution so you can see which services cost you the most. Know your totals, spot the outliers, and make smarter decisions about what to keep and what to cut. NEVER MISS A RENEWAL Smart notifications alert you before payments hit, so you always have time to decide — renew or cancel. No more surprise charges. SPLIT COSTS WITH EASE Sharing a family plan? SubTrack calculates the per-person cost for shared subscriptions, making it easy to track who owes what. PRIVACY BY DESIGN SubTrack never asks for your bank credentials. Your data stays on your device and syncs securely with iCloud. We believe tracking your money shouldn't mean giving it away. SUBTRACK PREMIUM — $1.99/month Unlock the full experience: · Unlimited subscription tracking · Smart renewal notifications · Cost splitting for shared plans · Custom app icons · Ad-free experience Whether you're managing 3 subscriptions or 30, SubTrack gives you the clarity to spend with intention. Download SubTrack today and start saving. Privacy Policy: [https://fringe-nephew-7cb.notion.site/2c4c77e9174c80008c06c8703cc5f697] Terms of Service: [https://fringe-nephew-7cb.notion.site/2c4c77e9174c807fa54ec7515ac0f514] Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Payment will be charged to your Apple ID account at confirmation of purchase. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.

Screenshots

Units4 screens
Subscriptionstrack3 screens

Verdict

The call

The clearest difference is ads: Subscriptionstrack at none against Units's shown. Subscriptionstrack also leads on update cadence (daily vs monthly). Units's advantage is iOS requirement (17.0 vs 26.0). On price, in-app purchases 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

Both are free to download. Units sells 3 one-off in-app purchases and Subscriptionstrack sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Units ships an update monthly, Subscriptionstrack daily. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
Units versus Subscriptionstrack: the parameters behind the verdict, then further details
ParameterUnitsSubscriptionstrack
PriceFreeFree
Rating4.1 (49 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings49 — better—
Update frequencyMonthlyDaily — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.0
Further details — not scored
Size86 MB17 MB
Age rating4+4+
DeveloperHomegrown Software LtdMENG JU WU

Bugs and requests

Units

Reported bugs

4 issues
  • Crashes when clearing input fields
  • Numerical keypad covers conversion results
  • Incompatibility issues with newer iOS versions
  • Ruler measurements not accurate on all devices

Requested features

5 requests
  • Add nautical units (miles, knots)
  • Improve currency conversion accuracy and updates
  • Allow customization of visible unit categories
  • Add more clothing/shoe size conversions
  • Improve user interface and search functionality

Subscriptionstrack

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Units

One-time3
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$4.99
1 purchases

Subscriptionstrack

Subscriptions1
  • Premium Monthly$1.991 Month

Questions

Is Units free?
Units is free to download, with in-app purchases available.
Is Subscriptionstrack free?
Subscriptionstrack is free to download, with in-app purchases available.
Do Units or Subscriptionstrack have ads?
Units shows ads; Subscriptionstrack does not.
Which is updated more often, Units or Subscriptionstrack?
Units ships an update monthly, and Subscriptionstrack daily. Most recently, Units was updated on October 24, 2026 and Subscriptionstrack on October 24, 2026.

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