Comparison

Amount vs Stampit

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

Head to head
About

Amount

Effortlessly convert units with this intuitive and lightweight tool. Get real-time results for over 700 units across 30+ categories displayed simultaneously. Customize your conversion lists and access your history.

Highlights
  • Real-time conversions on one screen
  • Over 700 units in 30+ categories
  • Customizable unit lists
  • Conversion history log
  • Search and custom unit creation
  • Lightweight and fast interface
Features
Read full description

Amount is the most intuitive, lightweight and easy to use unit converter you've ever seen. Amount let you convert units in a way you've never seen before: with just two tap of your finger you have all the results you're looking for in a single display, side by side. When you use Amount you don't have to think what are number is and choose from a long list of values which unit assign to it, spending time. Just let it do all the stuff! FEATURES • Incredibly lightweight, fast and easy to use. • Simple graphic and intuitive interface. • Over 700 units across more than 30 categories. • Real time conversions in one screen. • Create your own customized lists. You can change the order as you like and select just the units you want to see. • View your conversion history log (the history keeps even old exchange rates for currencies). • Search feature to let find the unit you want and instantly convert it. • Custom units can be added easily for each category. Categories Amount can handle: Acceleration, Angles, Area, Clothing (men and women), Cooking, Currency, Data, Density, Electric current, Energy, Flow (mass and volume), Force, Frequency, Fuel Consumption, Illuminance, Length/Distance, Luminance, Metric System, Network speed, Power, Pressure, Radiation, Speed, Temperature, Time, Torque, Typography, Viscosity (dynamic and kinematic), Volume and Weight/Mass. TIPS • Move between screens using swipe gestures. • Long press any category or unit to see more options. • Shake the device to change the sorting of category or units (only on iPhone). • You can change the number directly in the conversion screen by simply tapping it. ADDITIONAL INFO To convert currencies is required an internet connection. Currency and clothing size information are provided only for informational purposes. If you're going to download Amount, please rate and leave a comment! And if you have a suggestion don't hesitate to contact me. With your help I can improve Amount even more!

About

Stampit

Features
Read full description

Stampit is a smart and simple app for managing prepaid passes, coupons, and memberships with limited uses. Track your usage with ease and see remaining counts at a glance—no more relying on memory or messy notes. With Stampit, organizing your memberships has never been easier.

Screenshots

Amount4 screens
Stampit4 screens

Verdict

The call

The clearest difference is price: Stampit at Free against Amount's $0.59. Amount's advantage is update cadence (monthly vs every 4 months) and iOS requirement (8.0 vs 13.0). On ads, 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

Stampit is free to download; Amount costs $0.59 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Amount ships an update monthly, Stampit every 4 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
Amount versus Stampit: the parameters behind the verdict, then further details
ParameterAmountStampit
Price$0.59Free — better
Rating3.3 (39 ratings) — better—
Positive reviews86.7% of reviews—
Number of ratings39 — better—
Update frequencyMonthly — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size6 MB28 MB
Age rating4+4+
DeveloperMarco TorrettaHyunwoo Kim

Bugs and requests

Amount

Reported bugs

4 issues
  • Crashes when editing conversion lists
  • Incompatible with older iOS versions
  • Incorrect unit conversions (e.g. milli- vs centi-)
  • Currency conversion rates not updating properly

Requested features

5 requests
  • Add more common units (e.g. stones, bushels)
  • Improve currency conversion accuracy and update frequency
  • Implement landscape mode and iPad optimization
  • Add a widget and Apple Watch support
  • Improve unit organization and search functionality

Stampit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Amount

No in-app purchases

None

Stampit

No in-app purchases

Questions

Is Amount free?
Amount costs $0.59, with no in-app purchases.
Is Stampit free?
Stampit is free to download, with no in-app purchases.
Do Amount or Stampit have ads?
Neither Amount nor Stampit shows ads.
Which is updated more often, Amount or Stampit?
Amount ships an update monthly, and Stampit every 4 months. Most recently, Amount was updated on November 1, 2026 and Stampit on October 30, 2026.

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