AI-generated app flood leaves iOS synth developers stuck in Apple's App Review for weeks

A daily flood of AI-built music apps

According to Synth Anatomy, a site covering the iOS music software scene, an estimated 10 to 20 new iOS music apps now arrive every day. The driver is generative AI, which lets almost anyone "vibe code" a working app or AUv3 audio plugin without conventional programming skills. Every one of those submissions still has to clear Apple's App Review before it can reach the App Store, and according to the report the queue is buckling under the volume.

How review is supposed to work

Unlike desktop plugin development, where a developer can simply post installers on a website, iOS distribution runs entirely through Apple. Publishing requires a paid Apple Developer Program membership at 99 dollars a year, and every submission — synthesizer, effect, game or utility — must pass App Review before release.

Apple's own guidelines, cited by Synth Anatomy, promise that reviewers work around the clock, with at least half of submissions handled in under 24 hours and 90 percent in under 48. Developers quoted in the report say reality has drifted far from that target: instead of the usual day or two, apps are sitting in review for weeks with no updates.

Releases slipping out of sync

Synth Anatomy names several established developers caught in the backlog, including AudioThing, Igor Vasiliev and Sugar Bytes. Cross-platform launches have been hit hardest. Pittsburgh Modular shipped its Microvolt 3901 synthesizer as a VST on October 27, but the iOS version only appeared on November 12, despite a planned simultaneous release. Vasiliev's HollowTone app likewise spent weeks in review.

Rejections that read like hallucinations

The more damaging pattern involves rejections rather than delays. Michael Hetrick of Unfiltered Audio, a longtime iOS developer, documented the saga of his Sinusoidal Run Rhythm plugin on the Loopy Pro forum. He believes Apple is now using AI for automated App Store reviews, and the plugin was rejected four times: first with a demand for a demonstration video, then a claim that the term "Polyharmonic" was an audio technology requiring a documented license, then a request for video of the app running with unspecified "required proprietary hardware", and finally a spam flag on the MIDI edition for resembling the audio edition.

After more than a month of back-and-forth, Hetrick gave up and shipped the audio-only version, planning to bundle the MIDI build into the same binary so both AUv3 plugins install together.

A first-time developer locked out

The sharpest example is Marek Dendes, a newcomer who spent months building CRUX Synth, described by Synth Anatomy as a flagship-quality synthesizer for iOS. He reports four consecutive rejections, each citing the same reasons: that the app is "design spam", "duplicates existing apps", and was made with "app generation template services" — claims he calls obvious nonsense. He says his submissions flip from "Waiting for Review" to "In Review" to "Rejected" almost instantly, which he reads as proof that no human ever sees his responses. Appeals to the App Review Board went unanswered for about five days, and his contacts at Apple offered no real help. As of publication, the release was in serious doubt.

Why it matters

The App Store's core promise has always been curation: everything on it has been checked, so users can trust what they install. If AI-generated submissions have made human-scale review impossible, and Apple's response is automated reviewing that invents licensing requirements and mislabels original work as template spam, that promise fails in both directions — the store fills with low-quality duplicates while serious developers cannot ship at all.

The economics are asymmetric. A delayed update costs an established studio revenue; a blocked first release can end a new developer's livelihood before it starts. Synth Anatomy's author adds that the problem compounds a visibility gap Apple created earlier by ending its affiliate program, which once helped media cover small iOS releases, leaving mostly big names like Roland, Korg and Moog with reliable coverage. If the backlog and error rate persist, the report warns, the iOS music software ecosystem could be entering a strange and diminished period.