Every foldable phone made so far has one thing in common: the crease. It goes down the center of the inner display, visible from certain angles, which is impossible to ignore completely. Apple knows this, and according to many supply chain reports, removing it, or getting close enough that most people stop seeing it, is an engineering challenge for the iPhone Fold. Whether Apple ships the device in September 2026 or into 2027 may come down to whether that issue is resolved in time.
Why the crease exists and what Apple is doing about it
Crease forms because the display material must be repeatedly bent in the same position. Every time the phone folds, the inner layers compress slightly on one side and stretch on the other. In thousands of cycles, that stress is concentrated in a visible area. Samsung has discounted the most of its Z Fold generations, and OPPO’s Find N6 comes close, but no one has taken it away.
Apple’s method, according to analyst Ming-Chi Kuo, includes a free screen solution for Samsung Display, as it has decided that its internal method will not be ready for mass production. The panel uses an ultra-thin two-layer glass frame designed to spread mechanical stress across multiple layers rather than concentrating it on the folding surface, paired with advanced clear adhesives to keep the display layers perfectly aligned. Apple reportedly pursued this at no cost. That desire is part of what has caused the current production delay.
Hinge: where the crease and timeline meet
The crease and the hinge are inseparable. How well the folding line disappears depends directly on how the hinge controls the bending angle and how consistently it does so over time. As of mid-May 2026, trial production has reportedly stopped because the hinge mechanism fails to meet Apple’s standards under high-fold testing. According to MacRumors, an Instant Digital leaker on Weibo described it as an issue that needs to be resolved before production can move forward. The hinge uses a Liquid Metal alloy from Dongguan EonTec, a material chosen for its precision tolerances but proving difficult to measure.
The launch window is now really uncertain. Nikkei Asia reported in April that Apple had notified some suppliers of a possible delay to 2027. Engadget has put production one to two months behind schedule but is still pointing to a fall 2026 launch, with mass production aimed at July. What is indisputable is that the hinge, and by extension the crease, is what holds everything together.
The crease on the 7.8-inch screen is a different problem
The iPhone Fold’s internal display is expected to measure around 7.8 inches diagonally, based on a dummy unit comparison shared by Vadim Yuryev and supply chain reports compiled by Tom’s Guide. That size changes how the crease registers. On a 6-inch phone display, the fold line is a small fraction of the total screen. On the 7.8-inch panel, the crease moves into the area of more content, and it does so at the geometric center of whatever you’re looking at. That’s a different visual experience, and that’s why the desire to finish Apple is more important here than it would be on a smaller device.
Samsung Display showed off a crease-free prototype at MWC 2025. It hasn’t shipped with any consumer products yet, including the Galaxy Z Fold 7, although Samsung has reduced the appearance of the crease significantly on that device. Apple is betting on a version of that technology making it into the production iPhone this year, or next.
What does the crease mean in the video
For streaming, the crease sits in the worst possible place: the exact center of the screen, which in landscape mode falls right in the middle of whatever you’re looking at. In a near-free display, this is not a problem. In a panel where the crease is clearly visible, it’s hard to ignore during the film, especially in dark scenes where the ridge captures the look differently than the surrounding flat areas.
The rumored 14:10 device, next to the 3:2 panel on the iPad mini, means that the widescreen content will be a bit letterboxed. This affects a lot of content on Netflix for example. The screen area is still a significant step up from any current iPhone, and if the crease is as small as Apple is targeting, the case for watching video on the Fold rather than reaching for a tablet becomes real. If the crease is always visible, the bigger screen amplifies it rather than hiding it.
What does the crease mean in play
Games sharpen the crease problem further. In the video, the folding line is an annoyance that is done behind whatever is playing. In a game, it sits in the center of the active screen where the player is looking directly and reacts in real time. Fast-moving content makes the crease more visible, not less, because the eye tracks the movement and the crease is distracting.
There is also the distinct issue of aspect ratio. The iPhone Fold’s wide, short internal display doesn’t match the size of many mobile games it’s built for. Portrait app titles will be letterboxed or grow wildly, and landscape games designed for standard slab phones may stretch across a wide panel in ways developers didn’t intend. Both problems, crease and aspect ratio mismatch, are specific to native applications.
Browser-based games handle the two differently. HTML5 headers are designed to adapt to any display they run on, without fixed dimensions locked into a native layout. In Poki, a web-based gaming platform, titles reflow across all screen sizes in the browser. The crease is literally still there, but a dynamic gaming screen with it is a better fit for a non-standard display than a fixed specification build.
Bottom line
The iPhone Fold isn’t really about the screen size or the price or the hinge alone. It’s a matter of whether Apple can shrink the crease until it stops being the first thing people notice. Get that right and the 7.8-inch display becomes the real deal of the device for all video, multitasking, and general use. Get it wrong and the big screen makes the problem more visible, not less. Everything else in the rumor mill, launch date, software updates, price, follows from that one question.
Madhurima Nag is Head of Content at . She is a collaborative parent and STEM advocate and loves to voice her opinion on product marketing, innovation and (yes!) gadgets in general.