Comparison

Inflation Calculator vs Watch Spring

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

Head to head
About

Inflation Calculator

Easily determine the present-day value of past prices using up-to-date inflation data. This tool supports 22 international currencies and provides yearly updates, making it simple to understand historical cost comparisons.

Highlights
  • Calculate dollar value from 1800-2025
  • Supports 22 international currencies
  • Yearly inflation data updates
  • Apple Watch companion app
  • Simple and intuitive interface
Features
Read full description

NEW: TIME MACHINE AND ASK - Time Machine: pick any year and see what everyday things cost, with charts of prices over time. - Ask: ask anything about money and the past, answered with real inflation data. - Share any result or chart with a friend. Ever see a price from the past and wonder how much that would cost today? With Inflation Calculator, the answer is just a tap away. Features include: - Calculate the value of the dollar over time from 1800 to 2026. - Support for 22 international currencies: - US Dollar - Euro - British Pound - Canadian Dollar - Australian Dollar - New Zealand Dollar - Japanese Yen - Swiss Franc - Chinese Yuan - Swedish Krona - Mexican Peso - Norwegian Krone - South Korean Won - Turkish Lira - Brazilian Real - South African Rand - Indian Rupee - Russian Ruble - Israeli Sheqel - Indonesian Rupiah - Saudi Arabian Riyal - Colombian Peso - Yearly updates with the latest inflation data. - Simple and intuitive. No ads or distracting popups. PREMIUM Premium adds charts for every price and as many Ask questions as you like. Choose a yearly subscription (new subscribers get a 7-day free trial) or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and you can manage or cancel them anytime in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://dyoburon.com/inflation-calc-privacy-policy

About

Watch Spring

Track the accuracy and wear of your mechanical watches. Analyze trends with charts, log service history, and keep notes on watch details. See how your collection performs over time and manage your ownership history.

Highlights
  • Accuracy tracking and trend charts
  • Wear calendar and statistics
  • Watch collection summary cards
  • Service and repair logging
  • Ownership history timeline
  • Time-setting clock
  • CSV import/export
Features
Read full description

Track. Analyse. Enjoy.  Track mechanical watch accuracy and see drift over time. Log quick time-points, visualise trends with simple charts, keep notes about watch details, track service history, and balance your wrist time across your collection. Why it’s useful • Understand seconds-per-day accuracy and long-term behaviour • Spot issues after knocks or before/after a service • See which watches get the most wear • Keep track of key facts about your watches in one place Features • Accuracy charts & trend • Wear calendar & statistics • Watch collection summary shown as info cards; for a quick snapshot of key facts • Log servicing and repairs with notes and dates; see the before/after impact on accuracy • View your watch ownership history timeline • Time-setting clock (seconds-accurate) • Daily reminders • Import/Export CSV; share charts • iPhone-native, no ads, data stays on device How it works 1. Press and hold on the on-screen clock 2. When your watch matches the time, lift your finger 3. Watch Spring logs the time-point, updates charts, and marks your wear

Screenshots

Inflation Calculator4 screens
Watch Spring4 screens

Verdict

The call

The clearest difference is price: Inflation Calculator at Free against Watch Spring's $3.99. Inflation Calculator also leads on ratings volume (3.6K vs 3) and iOS requirement (16.0 vs 26.0). Watch Spring's advantage is in-app purchases (none vs 4) and update cadence (every 3 weeks vs every 3 months). On rating, ads 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

Inflation Calculator is free to download; Watch Spring costs $3.99 up front. Inflation Calculator sells 4 in-app purchases, starting at $7.49 per year. Watch Spring asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Inflation Calculator against 5.0 for Watch Spring. That said, the two scores are not equally well evidenced: Inflation Calculator has 3.6K ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 85% of Inflation Calculator's written reviews are positive against 100% of Watch Spring's.

UpkeepUpdate frequency

Inflation Calculator ships an update every 3 months, Watch Spring every 3 weeks. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

Scorecard7 real differences · 3 level
Inflation Calculator versus Watch Spring: the parameters behind the verdict, then further details
ParameterInflation CalculatorWatch Spring
PriceFree — better$3.99
Rating4.9 (3.6K ratings)5.0 (3 ratings) — better
Positive reviews85.1% of reviews100.0% of reviews — better
Number of ratings3.6K — better3
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhoneiPhone
Requires iOS16.0 — better26.0
Further details — not scored
Size4 MB12 MB
Age rating4+4+
DeveloperDylan BurtonSimon Greig

Customer experience

Inflation Calculator

All ratings3,573 ratings
Positive98.0%
Neutral1.1%
Negative0.9%
Written reviews134 reviews
Positive85.1%
Neutral7.5%
Negative7.5%

Watch Spring

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Inflation Calculator

Reported bugs

2 issues
  • Not updated beyond 2024
  • Caps out at 2020 for some countries

Requested features

4 requests
  • Update to 2025
  • Add support for more currencies
  • Improve design and usability
  • Allow direct data input

Watch Spring

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Inflation Calculator

Subscriptions2
  • Premium (yearly)$7.491 Year
  • Premium (yearly)7 Days trial$14.991 Year
One-time2
  • Premium (lifetime)$14.99
  • Premium (lifetime)$29.99
None

Watch Spring

No in-app purchases

Questions

Is Inflation Calculator free?
Inflation Calculator is free to download, with in-app purchases available.
Is Watch Spring free?
Watch Spring costs $3.99, with no in-app purchases.
Which has better reviews, Inflation Calculator or Watch Spring?
Watch Spring is rated higher. Inflation Calculator averages 4.9 out of 5 from 3.6K ratings, while Watch Spring averages 5.0 from 3 ratings.
Do Inflation Calculator or Watch Spring have ads?
Neither Inflation Calculator nor Watch Spring shows ads.
Which is updated more often, Inflation Calculator or Watch Spring?
Inflation Calculator ships an update every 3 months, and Watch Spring every 3 weeks. Most recently, Inflation Calculator was updated on November 1, 2026 and Watch Spring on October 27, 2026.

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