Hvad er FAP-filformatet?
En .fap-fil er en Flipper Application Package, en applikation bygget til Flipper Zero-multiværktøjet lavet af Flipper Devices. Under motorhjelmen er det en .elf-objektfil kompileret til STM32WB55's ARM Cortex-M4-kerne, med Flipper-specifikke metadata, et ikon og ressourcer pakket ind i ekstra sektioner.
Da Flippers mikrocontroller ikke kan køre kode direkte fra SD-kortet, kopierer firmwarens App Loader en .fap ind i RAM, kontrollerer at dens API-version er kompatibel, anvender relokeringer og løser de firmware-funktioner, den kalder, før den køres. Hver pakke registrerer den firmware-API-version, den er bygget til, så en app bliver ved med at fungere på tværs af firmware-builds, så længe major-versionen matcher. Udviklere opretter FAPs med Flipper Build Tool (FBT eller den lettere ufbt), styret af et application.fam-manifest, der markerer appen som ekstern.
Sikkerhed og tryghed
RISIKO: MEDIUMA .fap is native ARM code that runs on the Flipper Zero, so a malicious or buggy app could misbehave on the device, though it runs in the Flipper's constrained environment and cannot infect a desktop PC by sitting on it. The main caution is that FAPs can drive the Flipper's radios and GPIO in ways that may be illegal or harmful if misused. Install FAPs from the official catalog or trusted repositories, and be aware community apps are not reviewed as strictly as official ones.
Formatdetaljer
kort fortaltFULDSTÆNDIGT NAVNFlipper Application Packageogså kendt som Flipper App Package, FAP
UDVIKLERFlipper Devicessiden 2022
KATEGORIEksekverbare filer
MIME-TYPEapplication/octet-stream
TYPEBinary (ELF-based relocatable executable with embedded metadata and resources)
Dette filtypenavn bruges også af…
- FileMaker (older ACT! / generic) - The .fap extension has occasionally appeared as an application or project file in older niche software, unrelated to Flipper Zero.
- Generic 'application package' data - Some legacy tools used .fap as an ad hoc application data file; these predate and are unrelated to the Flipper Application Package.
MAGIC BYTES · FILSIGNATUR
OFFSET
00010203
HEX
7F454C46
ASCII
·ELF
A FAP begins with the standard ELF magic (0x7F 'E' 'L' 'F') because it is an ELF object file. It has no unique .fap signature; the Flipper-specific metadata (fap_version, api version, icon, name) is embedded in ELF sections, so the file is identified by its .fap extension and ELF contents rather than a distinct header.
Programmer der åbner FAP-filer
Windows3 apps
qFlipper
Gratis Connect the Flipper Zero over USB, open Applications, choose Install Application, and select the .fap to write it to the device.
Flipper Lab (lab.flipper.net)
Gratis Open the site in a browser with the Flipper connected over USB and install a .fap straight from the catalog or a local file.
Flipper Build Tool (FBT / ufbt)
Open-source Build, launch, or debug a .fap from source using ufbt or fbt fap_{APPID} targets. 
macOS3 apps
qFlipper
Gratis Connect the Flipper over USB, open Applications, choose Install Application, and pick the .fap to install it.
Flipper Lab (lab.flipper.net)
Gratis Install a .fap from the web catalog while the Flipper is plugged in over USB.
Flipper Build Tool (FBT / ufbt)
Open-source Compile and deploy a .fap from app source using the ufbt toolchain. 
Linux3 apps
qFlipper
Gratis Attach the Flipper over USB, open Applications, choose Install Application, and select the .fap to flash it to the device.
Flipper Lab (lab.flipper.net)
Gratis Use the browser catalog to install a .fap onto a connected Flipper Zero.
Flipper Build Tool (FBT / ufbt)
Open-source Run ufbt launch or fbt fap_{APPID} to build a .fap and load it onto the device. 
Android1 app
Flipper Mobile App
Gratis Pair with the Flipper over Bluetooth, open the Apps section in the Hub tab, and install a .fap from the catalog.
iOS1 app
Flipper Mobile App
Gratis Connect to the Flipper over Bluetooth, open Apps in the Hub tab, and tap Install on the .fap you want. Tekniske detaljer
dyb specifikation| Encoding | Binary ELF object file |
| Byte order | Little-endian |
| Container | ELF (Executable and Linkable Format) |
| Elf Machine | ARM (Cortex-M4F / Thumb), targeting the STM32WB55 MCU on Flipper Zero |
| Code Model | Relocatable / position-independent; the App Loader processes relocations and resolves imported firmware symbols at load time |
| Symbol Resolution | Imported functions are resolved against the firmware symbol table generated from api_symbols.csv |
| Embedded Metadata | App name, icon, category, stack size, fap_version and required firmware API version stored in dedicated ELF sections |
| Resources | Static and animated images can be bundled as private assets via the fap_icon_assets manifest field |
| Build Tool | Flipper Build Tool (FBT / ufbt), configured through an application.fam manifest with apptype FlipperAppType.EXTERNAL |
| Loading | Cannot execute in place from SD card; the App Loader copies the FAP into RAM, verifies compatibility, applies relocations, then runs it |
| Typical size | A few kilobytes to a few hundred kilobytes |
| Integrity | App Loader verifies API-version compatibility before running; no separate CRC/hash in the file itself |
| Platforms | Flipper Zero firmware (FreeRTOS-based) |
| Structure | Standard ELF layout (ELF header, program/section headers, .text/.data/.rodata, relocation and symbol tables) plus custom sections carrying Flipper app manifest data and icon assets. |
| Notes | FAPs are not tied to one firmware build; compatibility is decided by the required API version embedded in the file. Distributed through the official Flipper Apps catalog (lab.flipper.net), the Flipper mobile app, and community repositories. |
| Udgivet | 2022 |
| Seneste version | Tied to firmware API version (major.minor) |
| Specifikation | developer.flipper.net |
FAP-konverteringer
Fællesskabets Q&A
spurgt af brugereIngen spørgsmål endnu - vær den første til at spørge om FAP-filer.
Ofte stillede spørgsmål
Hvordan åbner jeg en .fap-fil?
Du installerer den på en Flipper Zero i stedet for at åbne den på en computer. Brug qFlipper eller Flipper Lab via USB, Flipper-mobilappen via Bluetooth, eller kopier
.fap-filen til SD-kortets apps-mappe og start den fra Apps > External på enheden.Kan jeg åbne en .fap-fil på min PC?
Ikke for at køre den. En PC kan ikke eksekvere Flipper ARM-kode. Du kan inspicere en
.fap som en ELF-binær fil med værktøjer som readelf eller Ghidra, men den virker kun på en Flipper Zero.Hvor placeres FAP-filer på SD-kortet?
De ligger i kategori-undermapper under
apps-mappen på Flippers microSD-kort. Kategorien kommer fra appens manifest, og appen vises derefter under Apps på enheden.Hvorfor vil min FAP-fil ikke indlæses på min Flipper?
De fleste indlæsningsfejl skyldes et API-versions-mismatch. FAP-filen blev bygget til en anden firmware-API-version end den, din Flipper kører. Opdater appen eller firmwaren, så major-API-versionerne matcher.
Hvordan opretter jeg en .fap-fil?
Skriv appen i C, tilføj et
application.fam-manifest med apptype FlipperAppType.EXTERNAL, og byg den med Flipper Build Tool (FBT) eller den selvstændige ufbt.Er FAP-filer sikre at installere?
FAPs fra det officielle katalog er de sikreste. Community-FAPs er indfødt kode med adgang til Flippers hardware, så installer kun fra kilder, du stoler på, og følg lokale love, når du bruger radio- eller adgangsfunktioner.
Referencer
1Flipper Developer Docs - FAP (Flipper App Package)developer.flipper.net
2Flipper firmware documentation - AppsOnSDCard.mdgithub.com
