Folium
Multi-system emulation
USD 2.99
Fixes a crucial issue with Cytrus, improves game detection and Library population performance and more
Folium is a beautifully designed, high performing multi-system emulator that allows you to play video games from retro consoles and handhelds
-- NOTE --
Folium does not provide any games or system files, these must be provided by the user
Emulation may be slow on older devices depending on the console or handheld emulated
-- NOTE --
Supported Consoles
- ColecoVision
- Game Boy, Game Boy Color
- Game Boy Advance
- Nintendo 3DS, New Nintendo 3DS
- Nintendo DS, Nintendo DSi
- Nintendo Entertainment System
- SEGA Genesis, Mega Drive
- Super Nintendo Entertainment System
- PlayStation 1
Supported Controllers
- Backbone One
- Nintendo Switch Joy-Con
- Nintendo Switch Pro Controller
- PlayStation DualShock 4
- PlayStation 5 DualSense
- Xbox Series S
- Xbox Series X
Folium is in no way affiliated with Nintendo. "Nintendo" and all associated game console and handheld names and game controller names are registered trademarks of Nintendo Co., Ltd
Folium is in no way affiliated with Sony. "PlayStation" and all associated game controller names are registered trademarks of Sony Group Corporation
Folium is in no way affiliated with SEGA. "SEGA" and all associated game console and handheld names are registered trademarks of SEGA Group Corporation
more Changed
- Updated Azahar for Cytrus to the latest available version on GitHub
Fixed
- an issue where input via the on-screen buttons and external gamepads would not work in Cytrus
- an issue where audio was handled unnecessarily in Grape causing minor static
Removed
- SDL3 audio output from Cytrus until its fully functional, replaced with CoreAudio as of now
1.38 18 Mar
Added
- the ability to export 3DS save states for use with other applications
- support for ColecoVision with an experimental new keypad layout
- support for Nintendo Wi-Fi Connection enabling online multiplayer with custom servers
Changed
- the ABXY buttons on Cytrus to correlate with the ABXY of the 3DS
- Grape emulation screen to use the new Liquid Glass layout
Fixed
- an issue where save states from old versions of Folium would not work in Cytrus on newer versions of the app
- an issue where the thumbstick was above the buttons on Cytrus causing broken input
Miscellaneous
- updated MoltenVK to the latest version available
1.37 12 Mar
# Added
- multiplayer chat to Cytrus
- currently only available on iOS and iPadOS 26
- SEGA Genesis and Mega Drive support via the new Plum core
- significantly improved PlayStation 1 support via the new Mandarine core
- additional information to each core which can be viewed via the ⓘ button
- full iOS 16 support back in response to a plethora of user requests
# Changed
- to the latest Azahar core available on GitHub
- all emulation controllers bar Cytrus and Grape to the new redesign
- Library, Onboarding and What's New to use the same controller
# Fixed
- several iPad layout issues when emulating with Cytrus and Grape
- game controller support for all emulation controllers bar Cytrus and Grape
- this will require testing, PS5 game controller does work from my testing
- Plum does not support game controllers yet due to the weird 3/6 button layout
# Removed
- Lychee in favour of the new Mandarine core
- the Lychee folder will automatically be renamed to Mandarine upon initial launch
- Motion & Fitness onboarding step to hopefully fix macOS support
1.36 19/12/2025
Added
- thumbsticks back to Cytrus on iOS and iPadOS 26 with an all-new Liquid Glass design
- multiplayer back to Cytrus on iOS and iPadOS 26 (chat is currently missing)
Changed
- the layout of several buttons with Cytrus and Grape on iOS and iPadOS 26 improving the overall layout and reducing the number of buttons on-screen
- the layout of Cytrus and Grape on iOS and iPadOS 26 to separate the screens, mimicking real devices
- multiplayer with Cytrus, rewriting the code to improve function handling and interface for user experience
Fixed
- all cameras with Cytrus significantly improving clarity and improving capture performance
- an issue with Cytrus improving the 5:3 and 4:3 aspect ratio screens
- an issue where save states for Cytrus would cause the app to crash when outdated
- an issue with Onboarding and What's New on iPad
Miscellaneous
- rewrote a large portion of Cytrus' bridging code in Swift 6 improving clarity and reducing the amount of code
- updated several dependencies and fixed a bunch of warnings related to C++2b
1.34 28/10/2025
Added
- a new issue screen that displays per-core issues
- support for SDMC and NAND application for the Cytrus core
Changed
- how games are loaded to remove potential duplicates or invalid game files
1.33 17/10/2025
Added
- support for installing 3DS game update files
- 4x upscaling to Grape, Guava and Kiwi
Changed
- Grape, Guava and Kiwi so that they all use the improved Metal renderer
- logging to be more clear, shorter due to reduced path names and more
- gamepad handling of connections and disconnections to (hopefully) fix all gamepad types support
- the SNES DSP so that resamples audio based on the generated samples fixing clicking sounds in some games
Fixed
- an issue where 3DS game files would be read multiple times bloating the log file and reducing performance
- an issue with the unsupported .3ds file extension by automatically renaming .3ds game files to .cci
1.32 15/10/2025
Added
- a new "What's New" screen when launching the app after each new release
- a new Liquid Glass emulation controller for Grape and Kiwi
- multiple load and save state support for Grape
- support for iPhone Air and 17 series to all cores
Changed
- the renderer for Kiwi to now use Metal making use of the GPU
- aes_keys.txt for Cytrus so that it is now optional making all system files for Cytrus optional (only applies when games are decrypted)
Fixed
- a crash that would occur for Cytrus when tapping the bottom screen or an on-screen controller button when the system was not fully booted
1.31 10/10/2025
Added
- Added a new onboarding process to request certain permissions and describe several changes
- Added the ability to import custom artwork for games with or without embedded artwork
- Added support for direct boot, loading and saving states and in-game saving when using the Grape core
- Added a new Guava core emulating the Nintendo Entertainment System
- Added a new filter menu button to the Library allowing users to hide or show specific cores and jump to a core
- Added a new import menu button to the Library with improvements to game and system file importing
Changed
- Changed the Guava, Lychee and Tomato emulation screens to use Liquid Glass with an improved layout (iOS 26 only)
- Changed how games are loaded upon app launch improving error handling and performance
- Changed game importing allowing users to select the correct core if a game' file extension belongs to multiple cores
- Changed system file importing allowing users to select them directly from the Library after which the app will copy them to the appropriate location
Fixed
- Fixed an issue where Sign in with Apple would display an error due to an invalid authentication key
- Fixed an issue with Lychee emulation where the RGB24 mode would cause flickering or malformed graphics
- Fixed an issue where a device would reboot when emulating using Cytrus caused by MoltenVK
Miscellaneous
- Updated all cores to their latest versions (excluding melonDS)
- Updated all dependencies to their latest versions
- Updated all Swift code to use the latest version of Swift 6
Add issues to GitHub if found so that Folium can be improved even further
https://github.com/folium-app/folium
1.30 19/09/2025
- (Cytrus) Added Azahar settings to the settings screen
- (Cytrus) Added support for the left and right rear cameras
- (Cytrus) Added a new screen for multiplayer rooms
- (Lychee) Added support for booting exe files
- Changed the layout of the import games and settings menus
- (All) Changed skins so they actually work with Nintendo and PlayStation button names
- (All) Changed how emulation notifications are handled for application state and controller connections
- (Cytrus) Changed the core from Cytrus to CytrusAzahar
- (Cytrus) Changed how the settings screen is handled
- (Cytrus) Changed how multiplayer rooms are handled
- (Grape) Changed how the settings screen is handled
- (All) Fixed an issue where changing orientation would remove the settings button's menu
- (Lychee) Fixed an issue where rendering would be broken when in 24-bit mode
- (Lychee) Fixed a crash related to the RGB24 rendering mode
v1.20 29/04/2025
- Added haptic feedback when loading and saving states when emulating with Cytrus, Grape and NewGrape, feedback is different for a failed or successful load or save
- Added the ability to load and save states to the NewGrape core (melonDS)
- Added audio output support for the NewGrape core (melonDS)
- Added HQx upscaling support for the Grape and NewGrape cores
- Fixed crashing in NewGrape (melonDS) when pressing buttons
- Fixed minor errors related to the C and CXX dialect update below
- Updated all packages and targets to c2x and cxx2b
1.19 14/04/2025
- Added a small "Swipe for more" footer when more than one cheat or save state
- Added the ability to delete accounts
- Added a new experimental NewGrape core based on melonDS 0.9.5
- Added the ability to use the Nintendo DSi mode to the NewGrape with appropriate files
- Connecting a controller no longer hides the settings button
- Cytrus' default skin on iPad and iPhone mini models now displays the correct blurred thumbsticks
- Fixed a large memory leak related to the camera when emulating with Cytrus
- Fixed a small memory leak related to file handling operations when emulating with Cytrus
- Updated Cytrus to the new SDL3 migration branch
- Updated the VulkanSDK to 1.4.309.0
1.18 11/04/2025
- Added a new middle-man screen for 3DS games containing information about the game, it's cheats and save states (if any) and play and delete buttons
- Added support for the iPhone 16e and latest iPad models
- Added more information to 3DS games and added save state validation
- Added the ability to delete cheats and save states and toggle cheats in the middle-man screen
- Fixed an issue where load and save state buttons would not have an identifying image on iOS 17 or below due to incorrect SF Symbol names
- Fixed an issue where "force touching" the settings button during emulation would not bring up the menu the first time
- Fixed an issue where cheats for 3DS games would show for games that were not the currently selected one
- Reverted to a clean build of Citra (Cytrus) improving performance with the latest MoltenVK
1.17 19/03/2025
- Fixed an issue where some games could not be displayed or installed
1.16 05/03/2025
- Added symbols and text to blurred buttons to help discern function
- Added the ability to import missing files by tapping the respective file
- Added load and save states to the Game Boy Advance, Nintendo 3DS and Nintendo DS cores
- Re-implemented Game Boy Advance via the NanoBoyAdvance core
- Rewrote significant portions of the app to improve functionality and performance
- Switched all emulation screens to the new blurred style
- Updated all dependencies to ensure all the latest improvements are available
1.15 03/03/2025
- Added PlayStation 1 emulation with the Lychee core (based on a modified PSXE by allkern)
- Added new default emulation controllers with visually appealing blur effects
- Added a new Missing Files option to the settings menu to assist with initial set up
- Added new options to the App Settings screen
- Added a new blurry button type to skins for skin creators
- Added real world pedometer data to the Cytrus core
- Added gyroscopic data to the Cytrus core
- Added widgets for Last Played and Play Time
- Added cached artwork for the Lychee and Mango cores
- Added the ability to delete games for the Lychee and Mango cores
- Changed the Cytrus Web API option from the App Settings screen to the Cytrus Settings screen
- Changed the cards on the Library screen to be the correct aspect ratio for their respective consoles
- Fixed an issue where the Mango core would crash when no audio or video data is available
- Fixed a minor memory leak for game icons using the Grape core
- Removed swipe to tap which caused issues where the button would be stuck down
1.14 02/01/2025
- Added support for custom layout options for the Cytrus core
- Added the ability to open the Cheats screen when in-game for the Cytrus core
- Added a new log level setting for the Cytrus core to help with debugging
- Added basic support for DSi mode for the Grape core by updating NooDS
- Added landscape support for the Grape and Mango core on all iPhone models (iPad is WIP)
- Changed the number of columns for both Authentication and the Library screens
- Changed how the keyboard works for the Cytrus core enabling support for both iPad and iPhone
- Fixed an issue where all iPad models could not receive touch
- Fixed an issue where the on-screen controller would display again when the device orientation changes while a Bluetooth controller is connected
- Fixed a crash when installing system applications for the Cytrus core caused by applications with invalid artwork
- Fixed an issue where thumbsticks in custom skins would not use their assigned background artwork
- Fixed an issue where Nintendo DS game titles would be duplicated in the Library screen
- Updated the MoltenVK dependency which may fix some graphical issues
1.13 04/11/2024
- Added support for cheats and multiplayer to the Cytrus core
- Added support for the iPad mini (A17 Pro)
- Changed how the import and settings buttons appear on the Library controller
1.12 30/10/2024
- Added support for the iPhone 16 series
- Changed and updated core code
- Update MoltenVK to the latest available
1.11 15/10/2024
- Added currently unimplemented Game Boy, Game Boy Color core, Tomato
- Added support for several more iPad device models
- Changed how library loading ensuring only the roms directory of each core is scanned, fixing potential duplicates and more
- Fixed an issue where the emulation screen would disappear when connecting a physical controller
- Removed automatic archive feature
1.10 16/09/2024
- Added automatic hiding and showing of the on-screen controller when a physical controller is connected and disconnected
- Added support for the front camera in the Cytrus core
- Added YUV422 support for both the front and rear cameras in the Cytrus core
- Added an archive feature that will back up and reset the documents directory every major release to ensure a smooth transition between releases
- Added the ability to extract a previous archive reverting any changes
- Added support for the system apps in the Cytrus core
- Changed how several features are handled improving support for both iPad and iPhone
- Fixed crashing when using Sign in with Apple or Skip due to a damaged documents directory
- Fixed an issue with the AES keys in the Cytrus core
- Fixed an issue where the X/Y button on physical controllers would get stuck
- Fixed an issue where system apps would be duplicated in the Cytrus core
- Sorted games within the library screen alphabetically
1.9 11/09/2024
- Added SNES emulation through the Mango core
- Added camera support to the Cytrus core
- Added controller support to all cores
- Added a BETA badge to work-in-progress cores
- Added "Sign in with Apple" for App Store specific features (optional)
- Added the delete functionality to all cores on the library screen
- Changed on-screen controls and skins improving handling and functionality
- Changed the Cytrus core to a low-end device focused fork of Citra, Mandarine
- Changed how the library and search are handled improving performance and usability
- Changed how the core settings are handled improving usability
- Changed how games and skins are loaded upon launch improving performance
- Fixed issues with the library screen removing memory leaks
1.7 07/09/2024
- Adds back support for portrait when using Cytrus on iPhone
- Adds back thumbsticks to both iPad and iPhone
- Adds support for enabling LLE modules (for Pretendo)
- Reduce memory usage by up to 200 MB
1.6 03/07/2024
- Changed how games are imported improving speed and fixing an issue where the library would flash constantly
- Fixed an issue where the default skins on iPad would not work when in landscape
- Fixed an issue where skins would not work when the skin didn't have a layout for the current orientation
- Fixed an issue where the audio output volume when using OpenAL would be very low
1.5 28/06/2024
- Added support for enabling, disabling and removing cheats for Nintendo 3DS emulation
- Added support for booting the Nintendo 3DS Home Menu (when imported)
- Added a confirmation alert when using "Reset Settings" for Nintendo 3DS emulation
- Added skin support for Nintendo DS and Nintendo 3DS emulation
- Added support to the on-screen controller and default skin for PlayStation emulation
- Added support for iPad
- Changed the on-screen controller and default skin to (hopefully) work on all supported iPad and iPhone models
- Changed the user interface for the library
- Fixed an issue where the emulation state would not toggle with the application state
- Fixed an issue where Game Boy Advance games would not boot directly causing graphical issues
1.4 21/06/2024
- Added all (except 3D related) settings to the Cytrus in-emulation options button
- Added a new, working Stop & Exit setting to the Cytrus in-emulation options button
- Changed Shader JIT to be disabled by default
- Changed the emulation screen (again) when emulating using Cytrus
- Changed the number of columns displayed in the library in preparation iPad support
- Changed how new games are imported to remove the full library reload requirement
- Fixed an issue with Nintendo DS game artwork memory allocation
1.3 07/06/2024
Changed
- Updated Azahar for Cytrus to the latest available version on GitHub
Fixed
- an issue where input via the on-screen buttons and external gamepads would not work in Cytrus
- an issue where audio was handled unnecessarily in Grape causing minor static
Removed
- SDL3 audio output from Cytrus until its fully functional, replaced with CoreAudio as of now
more Version 1.38 18 Mar
Data Not Collected The developer does not collect any data from this app.