Comparison

umop ǝpısdn vs Inflation Calculator

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

Head to head
About

umop ǝpısdn

Easily convert your typed text into an upside-down format for unique messages and emails. Offers options for lowercase conversion, phone number linking, and compatibility with Windows users. Supports accented characters and emojis.

Highlights
  • Flip text upside down
  • Convert to lowercase
  • Handle phone number links
  • Windows compatibility option
  • Support accented characters and emoji
Features
Read full description

Looking for something unusual, unique, and fun? Type text and flip it upside down. Send email and messages to friends with upside down text. .ʇxəʇ uʍop əpısdn ɥʇıʍ spuəıɹɟ oʇ SWS puɐ |ıɐɯə puəS .uʍop əpısdn ʇı dı|ɟ puɐ ʇxəʇ ədʎ⊥ ¿ unɟ puɐ ‘ənbıun ‘|ɐnsnun ɓuıɥʇəɯos ɹoɟ ɓuıʞoo⅂ Just enter text and watch it flip. Send as an email, a message, or post to Facebook or Twitter. Shake to clear entry for the next message. "uʍop əpısdn" has options that go beyond simple flipping apps: 1) Choose to convert all to lowercase (tends to produce more readable text). 2) Handles phone number links so that people can click on links and still make the correct call. 3) Windows friendly option - some Windows machines are less capable of handling the upside down glyphs, so turn this option on when sending email to Windows friends. 4) Handles accented characters and emoji. **Note that upside down messages sent to non-iPhone users do not always work — this is a limitation of their phones, not this software or the iPhone. Mail to Windows/Mac users should always work, as does copy and paste to websites, documents etc. Also note that this only works for languages primarily using the Roman alphabet. Don't try this with Japanese or Russian, for example, as you will be disappointed!** Here's what beta testers had to say about "uʍop əpısdn": "This is the dumbest app I've ever seen — I love it" — Elroy, Beta Tester "I expect something more useful next time, ok?!" — Kaoru, Developer's Wife Don't waste your time with lesser apps. Get "uʍop əpısdn" and start messaging your friends now! Even the app name is upside down — that's attention to detail! Though a problem for people searching for the app — didn't think that one through when I came up with the name...

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

Screenshots

umop ǝpısdn4 screens
Inflation Calculator4 screens

Verdict

The call

The clearest difference is rating: Inflation Calculator at 4.9 against umop ǝpısdn's 2.7. Inflation Calculator also leads on ratings volume (3.6K vs 6) and update cadence (every 3 months vs every 13 months). umop ǝpısdn's advantage is in-app purchases (none vs 4) and device support (3 vs 1). On price and ads 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. Inflation Calculator sells 4 in-app purchases, starting at $7.49 per year. umop ǝpısdn asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Inflation Calculator holds the better App Store score, 4.9 against 2.7. That said, the two scores are not equally well evidenced: Inflation Calculator has 3.6K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 73% of umop ǝpısdn's written reviews are positive against 85% of Inflation Calculator's.

UpkeepUpdate frequency

umop ǝpısdn ships an update every 13 months, Inflation Calculator every 3 months. Both last shipped on November 6, 2026.

Scorecard8 real differences · 2 level
umop ǝpısdn versus Inflation Calculator: the parameters behind the verdict, then further details
Parameterumop ǝpısdnInflation Calculator
PriceFreeFree
Rating2.7 (6 ratings)4.9 (3.6K ratings) — better
Positive reviews72.7% of reviews85.1% of reviews — better
Number of ratings63.6K — better
Update frequencyEvery 13 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS26.016.0 — better
Further details — not scored
Size6 MB4 MB
Age rating4+4+
Developercurmi.comDylan Burton

Customer experience

umop ǝpısdn

All ratings6 ratings
Positive33.3%
Neutral16.7%
Negative50.0%
Written reviews11 reviews
Positive72.7%
Neutral9.1%
Negative18.2%

Inflation Calculator

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

Bugs and requests

umop ǝpısdn

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

umop ǝpısdn

No 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

Questions

Is umop ǝpısdn free?
umop ǝpısdn is free to download, with no in-app purchases.
Is Inflation Calculator free?
Inflation Calculator is free to download, with in-app purchases available.
Which has better reviews, umop ǝpısdn or Inflation Calculator?
Inflation Calculator is rated higher. umop ǝpısdn averages 2.7 out of 5 from 6 ratings, while Inflation Calculator averages 4.9 from 3.6K ratings.
Do umop ǝpısdn or Inflation Calculator have ads?
Neither umop ǝpısdn nor Inflation Calculator shows ads.
Which is updated more often, umop ǝpısdn or Inflation Calculator?
umop ǝpısdn ships an update every 13 months, and Inflation Calculator every 3 months. Most recently, umop ǝpısdn was updated on November 6, 2026 and Inflation Calculator on November 6, 2026.

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