Comparison

FKey Browser vs Stacks

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

Head to head
About

FKey Browser

This web browser is designed for iOS devices, offering specialized keyboard support for sending function keys. It's particularly useful for accessing certain mainframe emulators and websites that require F-key input. Users can access custom configurations through ads or a subscription for unlimited, ad-free use.

Highlights
  • F-Key keyboard support
  • Mainframe emulator compatibility
  • Custom keyboard configurations
  • Rewarded ad access
  • Subscription for unlimited access
  • Ad-free experience with subscription
Features
Read full description

Looking for a way to send F-Keys through a web browser on IOS? This Web Browser is built with function key keyboard support for some 5250 IBM Main Frame web emulators and other websites that require function key input. Our standard keyboard configuration is free for all users to use on any website. PREMIUM WEBSITE CUSTOM KEYBOARD CONFIGURATIONS Some websites are built a little different from standard. To work with these sites, we have worked with users to develop custom configurations to properly send F-Keys to these non-standard websites. To use these Custom Keyboard Configurations, you will need to watch a rewarded ad for temporary access or subscribe for unlimited access without ads. A custom keyboard configuration has been built and tested with CN Rail CATS website (we are not affiliated with CN). For more information on Custom Keyboard Configurations, please see https://fkeybrowser.freshdesk.com/a/solutions/articles/72000521227 SUBSCRIPTION INFO FKey Keyboards now allows you to purchase a subscription to have unlimited access to Custom keyboard Configurations and remove all App ads. Subscriptions with a free trial period will automatically renew to a paid subscription. You can cancel your subscription in the iTunes settings at least 24-hours before the end of the free trial period. Subscription payments will be charged to your iTunes Account at confirmation of your purchase and upon commencement of each renewal term. Please note: any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period. You can cancel a free trial or subscription anytime by cancelling your subscription through your iTunes account settings. This must be done 24 hours before the end of a free trial or subscription period to avoid being charged. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service. Terms of Service: https://www.fkeybrowser.com/terms.html Privacy policy: https://www.fkeybrowser.com/privacy.html Have a feature request you would like to see in a future version of the app, or have a website that requires a Custom Keyboard Configuration? Do not hesitate to contact us at support@fkeybrowser.com

About

Stacks

Features
Read full description

Stacks - Ultimate Stackable Web Browser Pinch from the corners of a window to resize it Description Stacks is a revolutionary SwiftUI-based web browser that reimagines how we interact with multiple web pages. Unlike traditional browsers with static tabs, Stacks presents each webpage as an independent, floating window that can be freely moved, resized, and stacked in three-dimensional space. Core Innovation The browser treats each tab as a draggable, resizable window that exists in a shared workspace. Users can organize their browsing experience spatially - stacking related pages, spreading out research materials, or creating custom layouts that match their workflow. Key Features Advanced Window Management • Drag & Drop: Move windows anywhere by dragging title bars • Pinch-to-Zoom: Scale windows from 50% to 200% with gesture support • Resize Handles: Precise window sizing with corner drag controls • Layer Management: Bring windows to front with a single click Professional Web Browsing • Full WebKit Integration: Complete web browsing with modern standards support • Smart Navigation: Back/Forward buttons with real-time state management • URL Synchronization: Address bars automatically update when clicking links • Loading Optimization: 15-second timeouts prevent hanging pages Rich Customization • 6 Beautiful Themes: Default, Dark, Blue, Green, Purple, and Red color schemes • Dynamic Theming: Each window can have its own visual identity • Animated Backgrounds: Flowing gradients that respond to user interaction • Visual Feedback: Smooth animations for all interactions Privacy & Security • Private Browsing: True private mode with non-persistent data stores • Isolated Sessions: Private and regular browsing completely separated • Visual Indicators: Clear privacy status with lock-shield icons Enhanced User Experience • Grid/Stack Modes: Toggle between organized grid and free-form layouts • Magic Organization: Auto-arrange windows in perfect layouts • Search Integration: Create tabs from search queries or direct URLs • Bookmark Management: Integrated bookmark system with quick access Browser Tab Model: Each tab (BrowserTab) acts as an independent window with position, size, theme, history, and states (minimized/maximized). Supports private browsing, bookmarking, loading progress, and animations (scale/rotation/opacity). UI Components: Draggable Windows: Tabs can be moved, resized, minimized, or maximized. Theming: 6 color themes (default, dark, blue, green, purple, red) with gradient accents. Title Bar: Shows favicons, titles, loading progress, and window controls. URL Bar: Smart URL handling (auto-adds https://). Animated Background: Dynamic gradient effects. Advanced Features: Tab Organization: Grid/stack layout toggling. Tab Overview: Grid view of all open tabs. Bookmarks: Save/load frequently visited sites. Floating Action Menu: Quick actions (new tab, private tab, randomize themes, animations). Visual Effects: Smooth animations for opening/closing tabs, scaling, and rotation. State Management: Tabs maintain navigation history, loading progress, and interaction states. Z-index handling ensures focused windows stay on top. Summary Dynamic Tab Management: Tabs support dragging, resizing, minimizing, theming, and visual effects (e.g., "magic" animations). Rich Web Experience: Robust WebView with history tracking, loading states, and gesture-based navigation. User-Centric Tools: Tab overview for quick navigation. Bookmarks manager. Theming and layout customization. Floating action menu for common tasks. Aesthetic Polish: Animated gradients, smooth transitions, and tactile feedback for interactions. Use Case: Ideal for demonstrating advanced SwiftUI capabilities in building complex, interactive multi-window UIs with real-world browser functionality. Enjoy today!

Screenshots

FKey Browser4 screens
Stacks4 screens

Verdict

The call

The clearest difference is in-app purchases: Stacks at none against FKey Browser's 1. Stacks also leads on ads (none vs shown) and update cadence (daily vs every 3 months). On price, 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

Both are free to download. FKey Browser sells 1 in-app purchase, starting at $3.99 per month. Stacks asks for nothing beyond the download.

UpkeepUpdate frequency

FKey Browser ships an update every 3 months, Stacks daily. The most recent releases landed on September 22, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
FKey Browser versus Stacks: the parameters behind the verdict, then further details
ParameterFKey BrowserStacks
PriceFreeFree
Rating2.6 (5 ratings) — better—
Positive reviews35.7% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 monthsDaily — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.015.0
Further details — not scored
Size50 MB8 MB
Age rating17+17+
DeveloperMicah WallaceElliot Williams

In-app purchases

1 purchases

FKey Browser

Subscriptions1
  • FKey Browser Ad Free14 Days trial$3.991 Month
None

Stacks

No in-app purchases

Questions

Is FKey Browser free?
FKey Browser is free to download, with in-app purchases available.
Is Stacks free?
Stacks is free to download, with no in-app purchases.
Do FKey Browser or Stacks have ads?
FKey Browser shows ads; Stacks does not.
Which is updated more often, FKey Browser or Stacks?
FKey Browser ships an update every 3 months, and Stacks daily. Most recently, FKey Browser was updated on September 22, 2026 and Stacks on October 7, 2026.

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