Comparison

FastCalc vs SwizzAI

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

Head to head
About

FastCalc

This calculator app offers a streamlined experience with large, easy-to-use keys and an innovative gesture-based interface. It displays your ongoing expression and results in real-time, eliminating the need for an equals button. Advanced features include percentage calculations and customizable constants.

Highlights
  • Large, practical keys
  • Permanent expression display
  • Automatic real-time results
  • Gesture-based input
  • Customizable constants
  • Advanced percentage mode
Read full description

FastCalc is a calculator recognized for its efficiency and ease of use. It stands out thanks to: • its large keys, which allow for fast and accurate input, • the permanent display of the expression entered by the user, • the automatic display of the result while typing: no “=” key required! FastCalc is thus suitable both for everyday calculations and for more advanced use. BASICS OF USE The interface of FastCalc is innovative and minimalist, entirely based on simple gestures: • Select a side symbol on a key: slide your finger in its direction. • Delete the last entered elements: make a small swipe to the left on the display. • Clear the entire expression: swipe quickly to the left across the whole display. • Store a result in a memory: tap the result and choose the desired memory. FEATURES • Large, practical, and easy-to-read keys. • Customizable constants. • Advanced mode for percentage calculations. • Permanent display of the current expression and temporary memories. • Automatic storage of the previous result (ANS) each time an expression is cleared. • Integrated help videos and user guide (in ⓘ). SETTINGS • Enable interface sounds and adjust their volume. • Enable advanced mode. • Choose the number of displayed decimals and the thousands separators. • Customize the colors of the keypad and the expression.

About

SwizzAI

This AI-powered tool assists with generating text and images, drafting emails, answering questions, and solving problems. It offers priority access and iCloud sync, with a free tier for initial use. Unlock full capabilities with various subscription options.

Highlights
  • AI text generation
  • AI image generation
  • Drafting emails and content
  • Answering questions
  • Priority access
  • iCloud sync
  • Lifetime unlock option
Features
Read full description

Welcome to SwizzAI – The Ultimate AI Chatbot Assistant and AI Image Generator, powered by the latest GPT-5 and GPT-Image models from the official OpenAI API, Designed for iPhone, iPad, and Mac. The only one with a lifetime unlock option! Whether you need help in generating ideas, creating textual content, and captivating images, drafting emails, getting answers to your questions, solving math problems, or anything else, our cutting-edge AI Chatbot Assistant is ready to help you 24/7. ► WHY SWIZZAI? - No registration needed, just start typing. - No waiting, priority access without queues. - iCloud Sync, Markdown, and LaTeX support. - Five requests per device are absolutely free. - From an independent developer. No data collection. ► SWIZZAI IS USEFUL FOR: - Automatically generate images according to your preferences - Write essays using a given prompt or topic - Generate creative stories, poems, or dialogue - Provide explanations and insights on various topics - Support language learning by providing translations, definitions, and practice conversations - Help draft emails, letters, or other written communications - Provide recommendations for books, movies, music, and more based on user preferences DOWNLOAD SWIZZAI – AI CHATBOT ASSISTANT AND AI IMAGE GENERATOR APP TODAY! So why wait? Download and install now SwizzAI- AI Chatbot Assistant and AI Image Generator App for FREE. Engage in chat with the AI Chatbot, generate ideas, create textual content and captivating images, draft emails, perform high-quality translations, get answers to your questions, and receive academic help in one single place. GIVE US FEEDBACK: If you like SwizzAI - AI Chatbot Assistant and AI Image Generator App, please give us your precious feedback. We warmly welcome your recommendations, suggestions, and improvement ideas regarding our app. Visit our website at https://www.swizzai.ch/ and provide us with your feedback, so that we can improve our app. If you are facing any issues regarding our AI Chatbot Assistant and AI Image Generator app, please let us know. Our 5-Star customer support team will be happy to assist you. Thanks! IMPORTANT NOTE: Please note that the app allows unlimited requests, but a fair use policy applies. Excessive usage may result in temporary blocking or restrictions imposed on your account. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://privacy.swizzai.ch/

Screenshots

FastCalc4 screens
SwizzAI4 screens

Verdict

The call

The clearest difference is price: SwizzAI at Free against FastCalc's $1.99. SwizzAI also leads on update cadence (every 9 days vs every 5 months) and rating (5.0 vs 4.8). On review sentiment, ratings volume, ads and in-app purchases 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

SwizzAI is free to download; FastCalc costs $1.99 up front. FastCalc sells 4 one-off in-app purchases and SwizzAI sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SwizzAI holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 10 respectively. Written reviews point the same way: 80% of FastCalc's written reviews are positive against 85% of SwizzAI's.

UpkeepUpdate frequency

FastCalc ships an update every 5 months, SwizzAI every 9 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
FastCalc versus SwizzAI: the parameters behind the verdict, then further details
ParameterFastCalcSwizzAI
Price$1.99Free — better
Rating4.8 (4 ratings)5.0 (10 ratings) — better
Positive reviews80.0% of reviews84.6% of reviews — better
Number of ratings410 — better
Update frequencyEvery 5 monthsEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS26.015.0 — better
Further details — not scored
Size8 MB30 MB
Age rating4+4+
DeveloperAndre PonzoValerio Perrotta (CH)

Customer experience

FastCalc

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

SwizzAI

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive84.6%
Neutral0.0%
Negative15.4%

In-app purchases

4 purchases

FastCalc

One-time4
  • Red Rivella$1.99
  • Homemade hot chocolate$6.99
  • Bircher muesli$12.99
Show 1 more
  • Moitié-moitié fondue$34.99
4 purchases

SwizzAI

Subscriptions3
  • Weekly Unlock$3.997 Days
  • Monthly Unlock$8.991 Month
  • Yearly Unlock$59.991 Year
One-time1
  • Lifetime Unlock$249.00

Questions

Is FastCalc free?
FastCalc costs $1.99, and also offers in-app purchases.
Is SwizzAI free?
SwizzAI is free to download, with in-app purchases available.
Which has better reviews, FastCalc or SwizzAI?
SwizzAI is rated higher. FastCalc averages 4.8 out of 5 from 4 ratings, while SwizzAI averages 5.0 from 10 ratings.
Do FastCalc or SwizzAI have ads?
Neither FastCalc nor SwizzAI shows ads.
Which is updated more often, FastCalc or SwizzAI?
FastCalc ships an update every 5 months, and SwizzAI every 9 days. Most recently, FastCalc was updated on November 1, 2026 and SwizzAI on November 3, 2026.

Other comparisons