Comparison

100% Percent Calculator vs PanicButton+

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

Head to head
About

100% Percent Calculator

This app simplifies complex percentage calculations using natural language, making it accessible for individuals with dyscalculia or a fear of numbers. It helps with discounts, sales tax, tips, and more, offering an intuitive interface that guides users through problems.

Highlights
  • Natural language calculations
  • Discount calculations
  • Sales tax and VAT addition
  • Tip calculation
  • Intuitive user interface
  • Dyscalculia-friendly
Features
Read full description

The percent calculator that asks you the right question, instead of making you remember the formula. WHAT YOU CAN CALCULATE • Discount: how much off, or the final price after X% off • Sales tax / VAT: add or remove tax from a price • Tips: how much to leave, or what percentage someone tipped you • Profit margin & markup: for shop owners pricing inventory • "What percent is X of Y" and the rest of the basics REAL-LIFE USE CASES At the till deciding if "30% off" is actually a good deal. Adding VAT to a quote for a client. Splitting a restaurant bill after a couple of drinks (we've all been there). Pricing your own products with the right margin. The app is built around "what are you trying to figure out?" — not "here are all the buttons, good luck." CONVERTERS • Length and imperial ↔ metric, built in • Live currency conversion with daily exchange rates (Pro) PRO — ONE-TIME PURCHASE Pro is a single purchase. No subscription, ever. • Calculation history — tap any past result to copy it • Custom default values per calculator (e.g. always pre-fill your usual tax rate) • Live currency converter • Unlimited favorite calculators (free users get one) • Pick your accent color Built and maintained by a one-person indie studio. Buying Pro once keeps the lights on.

About

PanicButton+

Features
Read full description

If you're lost and/or if you need help, this application helps to be found and rescued. Just pre set one of your contacts address book and write a message. Pressing the panic button is created a message with your location and sent to the contact your previously defined. The message contains the coordinates of your location and a link to Google Maps, which shows you where you are.

Screenshots

100% Percent Calculator4 screens
PanicButton+2 screens

Verdict

The call

The clearest difference is price: 100% Percent Calculator at Free against PanicButton+'s $1.99. 100% Percent Calculator also leads on update cadence (every 10 days vs every 12 months). PanicButton+'s advantage is in-app purchases (none vs 4). On ads, device support and iOS requirement 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

100% Percent Calculator is free to download; PanicButton+ costs $1.99 up front. 100% Percent Calculator sells 4 one-off in-app purchases. PanicButton+ asks for nothing beyond the download.

UpkeepUpdate frequency

100% Percent Calculator ships an update every 10 days, PanicButton+ every 12 months. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
100% Percent Calculator versus PanicButton+: the parameters behind the verdict, then further details
Parameter100% Percent CalculatorPanicButton+
PriceFree — better$1.99
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 10 days — betterEvery 12 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.5 — better
Further details — not scored
Size5 MB1 MB
Age rating4+4+
DeveloperThomas Andre JohansenPaulo Correia

In-app purchases

4 purchases

100% Percent Calculator

One-time4
  • Small$0.99
  • Medium$1.99
  • Large$2.99
Show 1 more
  • 100% Pro$19.99
None

PanicButton+

No in-app purchases

Questions

Is 100% Percent Calculator free?
100% Percent Calculator is free to download, with in-app purchases available.
Is PanicButton+ free?
PanicButton+ costs $1.99, with no in-app purchases.
Do 100% Percent Calculator or PanicButton+ have ads?
Neither 100% Percent Calculator nor PanicButton+ shows ads.
Which is updated more often, 100% Percent Calculator or PanicButton+?
100% Percent Calculator ships an update every 10 days, and PanicButton+ every 12 months. Most recently, 100% Percent Calculator was updated on October 2, 2026 and PanicButton+ on October 4, 2026.

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