Comparison

FairOption vs Koyfin

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

Head to head
About

FairOption

Features
Read full description

WELCOME to the FairOption App *** THE GOLD STANDARD OPTION PRICING CALCULATOR (Since 2014) *** Version 3.2 is a super-powerful, easy-to-use option pricing tool completely rewritten using Apple's latest SwiftUI framework, and now available for numerous Apple devices including iPhone, Mac, iPad and Apple Watch. All versions include syncing of your securities data across all Apple platforms you purchase the App. See screenshots here for the main features, and website video for more detail. If you are someone who wants the best option pricing software on the top and most secure Apple platform, then you can do no better than use the FairOption App. FEATURES and BENEFITS: - Fast Option Pricing in a fully interactive, two-way scrollable grid. - Works great in Light and Dark Modes (Plus in Landscape and Portrait orientations on iPhone and iPad). - Greeks are displayed (with descriptions) by a single tap on any option result. - Auto Syncing of securities between your Apple devices. (The App is supplied per-platform) - Comprehensive Help document covering all app features and settings. - Binomial and Black-Scholes pricing models are included. (The Binomial has an adjustable number of calculation steps and is more suited to American exercise-style options. The Black-Scholes-Merton model is better for pricing European options and is adapted for dividend-paying securities) - Included Continuously Compounded Interest Rate calculator for input of the risk-free interest rate parameter. (Extensive explanation contained within help document) - Automatic strike price intervals that can be easily overridden with 1 tap. - Editable default template for all new securities. - Numerous utilities, including for import/export of securities data to a local file (in JSON or CSV format) for spreadsheet analysis, or backup/restore purposes. - Added Demo data utility: to help you get 'up-to-speed' using the 'Quick Start Guide'. - Test Calc mode to set a fixed amount of time to expiry for test and comparison purposes. - No 'in-app' purchases. (It's already 'All-in-there'!) - Designed by main Developer with over 30 years' experience of developing financial and option pricing software. *** Whether you are a Pro Trader, or someone just starting out learning about options, you will find FairOption to be an invaluable tool *** WHAT'S NEW in VERSION 3.2: - Ability to sync across all Apple device platforms you purchase the app - Complete rewrite using SwiftUI (The framework first introduced by Apple in 2019) - Import/Export of Securities data (This facilitates independent local backup and restore via the JSON file format) - Included Demo Data utility for testing and familiarity purposes. - All Option results tables are scrollable in both directions on all devices and fully interactive - Short-term Weeklys and longer-term LEAPS option expiry variants are specifically catered for - Improved, faster switching between Call and Put option results, but whilst still maintaining the current expiry and strike price selection - Included Continuously Compounded Interest Rate Calculator for easy calculation of the risk-free interest rate parameter - Editable default template for all new securities SUPPORT We welcome feedback and suggestions concerning FairOption. Please contact us at support@FairOption.com if you have any problems Our Terms of use: https://www.fairoption.com/terms.php Our Privacy Policy: https://www.fairoption.com/privacy.php Apple's Licence Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Koyfin

Access comprehensive financial data and analytics for stock research and market trend analysis. Track equities, ETFs, indices, and more with customizable charts, watchlists, and real-time news.

Highlights
  • Live & historical market data
  • Customizable charts & watchlists
  • Stock alerts & notifications
  • Real-time financial news
  • Portfolio tracking
  • Earnings estimates & price targets
Features
Currently charting
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Discover the Koyfin IOS app, part of the all-in-one platform for financial data and analytics, trusted by over half a million investors and rated 9.5 out of 10 for its value in the Kitces Report. Dive into stock research and catch market trends instantly with live & historical data, the latest news, and tools like customizable charts, watchlists, and stock alerts. Koyfin offers detailed tracking of various assets including equities, ETFs, indices, and more, ensuring your portfolio leads in opportunity. Koyfin syncs across mobile and the web, keeping your data—from market research to portfolio management—synchronized and accessible anytime, anywhere. Complete Data Coverage Gain access to high-quality data, a user-friendly platform, and top trending financial news. A combination of live and delayed data with the global markets coverage for a wide array of assets — equities, ETFs, mutual funds, indices, bonds, forex, futures, and global economics. Quickly grasp the whole picture of the stock market by analyzing prices, key financials, consensus estimates, dividends, and valuation ratios for all global stocks. Custom Watchlists Tailor watchlists with a diverse range of metrics, including price, performance, valuation, estimates, financials, and growth, to enhance your portfolio management and investment tracking experience. Alerts & Notifications Never miss an opportunity with our alert system. Set up price alerts for specific market movements and stay ahead with instant notifications for press releases on equities and watchlists. Market News Stay informed with Koyfin’s enriched news section, featuring real-time press releases, articles, news, and transcripts tailored to your interests. Read market news sourced from the biggest media, including Reuters, Bloomberg, CNBC, and others. Our Reuters news coverage, divided by thematic sections, gives you a real-time edge on what's moving stocks, sectors, and markets. Transform information into power. Market Movers Uncover the hottest stocks trading today on the markets from the major indices or your custom watchlists. Monitor daily stocks with the biggest daily gains, losses, and volume breakouts above their 10-day average in real-time all on one screen. Snapshots Gain the big financial picture with one tap on the phone. Identify market trends that can have a significant impact on investments, large and small. Financial Charts Unlock insight with our brilliant graphing tools that let you visualize stock performance. Analyze historical price charts to identify trends and spot investment opportunities. See performance charts to highlight the actual rate of return over any period. Earnings Estimates & Price Target Keep an eye on earnings estimates and determine what the stock is worth and where the price will be to pinpoint your potential investment opportunities. Custom Themes Just make it yours. Choose from the carefully designed Koyfin color themes to make the app interface pleasant to your eye. Free on mobile Koyfin app is absolutely free to download — unlock insights, no matter your budget! Please check https://www.koyfin.com/pricing/ for more details. ------------------------------------------------------------ Terms of use: https://app.koyfin.com/terms-and-conditions Privacy policy: https://app.koyfin.com/privacy-policy

Screenshots

FairOption4 screens
Koyfin4 screens

Verdict

The call

The clearest difference is price: Koyfin at Free against FairOption's $17.99. Koyfin also leads on update cadence (monthly vs every 23 months) and chart position (#150 vs unranked). FairOption'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

Koyfin is free to download; FairOption costs $17.99 up front. Koyfin sells 4 in-app purchases, starting at $30.00 per month. FairOption asks for nothing beyond the download.

UpkeepUpdate frequency

FairOption ships an update every 23 months, Koyfin monthly. The most recent releases landed on October 20, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 7 level
FairOption versus Koyfin: the parameters behind the verdict, then further details
ParameterFairOptionKoyfin
Price$17.99Free — better
Rating—4.9 (1.4K ratings) — better
Positive reviews—76.3% of reviews
Number of ratings—1.4K — better
Update frequencyEvery 23 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
Best chart rank—#150 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS16 — better17.6
Further details — not scored
Size6 MB74 MB
Age rating4+4+
DeveloperMiles HitchamKoyfin Inc

Bugs and requests

FairOption

Not enough reviews yet to summarise bugs or requests.

Koyfin

Reported bugs

3 issues
  • Crashes when searching for stocks
  • Charts flashing white before displaying in dark mode
  • Automatic subscription to premium package

Requested features

5 requests
  • Add more annual financial data on mobile app
  • Implement portfolio tracking and management
  • Improve news and research content
  • Add bond yield data
  • Develop an iPad version

In-app purchases

None

FairOption

No in-app purchases

4 purchases

Koyfin

Subscriptions4
  • Basic - Monthly$30.001 Month
  • Plus - Monthly$49.001 Month
  • Pro - Monthly$109.001 Month
Show 1 more
  • Premium monthly$109.001 Month

Questions

Is FairOption free?
FairOption costs $17.99, with no in-app purchases.
Is Koyfin free?
Koyfin is free to download, with in-app purchases available.
Do FairOption or Koyfin have ads?
Neither FairOption nor Koyfin shows ads.
Which is updated more often, FairOption or Koyfin?
FairOption ships an update every 23 months, and Koyfin monthly. Most recently, FairOption was updated on October 20, 2026 and Koyfin on October 30, 2026.

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