Reveal the Bicame Musume (ビッカメ娘) point-card face on any account —
normally you'd need to own that specific card to see it. All client-side, zero server impact.
ビックカメラ (BicCamera) is Bic Camera Inc.'s official iOS shopping app, available on the App Store.
BicSkin is a local tweak for BicCamera that cycles the on-screen point-card face with a double-tap. Two faces ship in v0.1.0 and the list is designed to grow — the toggle state is stored as an index into an ordered pool, not a boolean, so additional designs can be appended without breaking anyone's persisted preference.
Current pool:
| Index | Face | Source |
|---|---|---|
0 |
Plain default — BicCamera's pointcard_default watermark |
app bundle via imageNamed: |
1 |
Bicame Musume (ビッカメ娘) collaboration design | CDN prefetch |
The last index you flipped to is persisted to NSUserDefaults, so the
next launch starts on the same face — the tweak intercepts the first
setImage: on any view sitting inside a PointCard-named ancestor
(with a card-shaped aspect ratio so the barcode strip alongside isn't
swapped by accident) and substitutes the persisted choice before it
ever renders. Every change runs on-device and never touches the server
or your account state.
Left: the point card as this account normally shows it (the plain
BicCamera default — this demo account doesn't own Bicame Musume).
Right: after a double-tap flip, the same card view is swapped for the
Bicame Musume design, pulled straight from BicCamera's CDN. The numeric
fields (0314 159 265 35, 0 pt, expiry 2038-01-19) aren't real —
see Screenshot helper below.
Full 3D flip animation:
If the inline player doesn't render for you, download docs/demo.mov and open it locally.
| Toggle | What it does |
|---|---|
| Card face flip | Double-tap the point-card image to flip between the account's normally-fetched card art and the Bicame Musume design pulled from BicCamera's CDN. Uses a manual CATransform3D Y-axis rotation so the card's rounded corners are preserved throughout the animation. Scoped to the card + barcode block — the point-balance row below stays static. |
The swap image is fetched once when the tweak loads
(https://d1v4cay8lxkuwy.cloudfront.net/?storagekey=/images/pointCard/bicamemusume.png)
on a background queue and cached in a process-global UIImage.
Hardcoding the URL keeps the tweak resilient to renames of BicCamera's
in-app asset catalog and avoids the imageNamed: fallback path
entirely. If the fetch fails, the double-tap is a no-op — the app's own
card art stays on screen.
The point-card image itself is a UIImageView inside a
PointCardViewCell. The first setImage: per instance (skipping views
under 100k px so app icons and thumbnails are ignored) attaches a
double-tap UITapGestureRecognizer and stashes the fetched image via an
associated object. Each tap toggles a process-global flag and re-invokes
setImage: with either the stashed original or the cached swap image.
The animation is intentionally not the built-in flip transition.
UIKit's UIViewAnimationOptionTransitionFlipFromLeft/Right takes a
rectangular snapshot of the layer and animates that — the
cornerRadius + masksToBounds mask is dropped for the duration of the
flip, so the rectangular snapshot corners briefly show through around
the rounded card. BicSkin walks the superview chain from the image,
picks the deepest cornerRadius > 0 ancestor that still contains the
image, and runs a two-stage CATransform3D Y-axis rotation on its
layer directly. The mask stays applied, and the halves are stitched by
an edgeOn swap at π/2 inside a
CATransaction { setDisableActions: YES } so the implicit contents
fade doesn't leak.
Not a feature — a build-time helper used to produce the screenshots and
demo video in this README without exposing the maintainer's real card.
DEBUG builds swizzle NSJSONSerialization.JSONObjectWithData: /
JSONObjectWithStream: and rewrite the parsed profile-fetch response
with fixed dummy values before the app sees it:
| Field | Dummy value |
|---|---|
pointCardNumber |
31415926535 |
barcodeNumber |
3141592653589 |
points |
0 |
bicpayPoints |
0 |
pointExpiration |
2038-01-19 (Y2K38) |
bicpayPointExpiration |
2077-01-01 |
pointCardImage and the other fields are passed through untouched.
In FINALPACKAGE=1 builds the whole #ifdef DEBUG block is compiled
out — there is no runtime toggle and nothing that can fire it.
BicCamera is an online shopping app — the recommended target is always the latest supported version.
| Latest supported BicCamera | 5.4.3 |
| BicSkin minimum iOS | 14.0 |
| Tested on | iOS 15.0 – 17, arm64 |
| Distribution | Jailbroken .deb, TrollStore-installable Patched IPA, Sideload-installable Patched IPA |
make package install transfers and installs the .deb over SSH.
Requires OpenSSH on both sides — openssh-server on the device (install
via Sileo / Zebra) and ssh on the host.
make package
make package install THEOS_DEVICE_IP=<device-ip>Requires a TrollStore-supported iOS version — check the
supported versions table
before proceeding. make deploy builds the patched IPA, transfers it to
the device over SSH, and installs it via trollstorehelper in one shot.
mkdir -p assets
cp ~/Downloads/BicCamera-5.4.3.ipa assets/
make deployFor devices where TrollStore isn't available. Same flow as KiouForge's Patched IPA path — build the IPA locally, then hand it off to your sideload tool.
Requires a decrypted BicCamera IPA (e.g. via palera1n + Filza or TrollDecrypt) — App Store downloads are FairPlay-encrypted and cannot be patched directly.
mkdir -p assets
cp ~/Downloads/BicCamera-5.4.3.ipa assets/
make ipa
# -> packages/ipa/BicSkin.ipaThen load packages/ipa/BicSkin.ipa into
Sideloadly or
AltStore and install it onto the device.
MIT © tkgstrator