ZelonAI ZelonAI

iOS-app · iOS

Practice at your own tempo.

SpeedPlayer

SpeedPlayer is a precision speed player for video and audio practice, with dual playback modes (continuous 0.25x–4.00x and precision 0.01x–0.24x), A-B loops, state memory, and local-first privacy.

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SpeedPlayer mark

SpeedPlayer

status
status live
App Store
iOS
tech stack
SwiftUI · AVFoundation · Core Data · StoreKit 2

Med et blik

Fig. 01

Mastery hides in the slow parts. Take the passage down to a crawl, loop the hard bar, and come back up to speed.

I appen

Fig. 02
SpeedPlayer — screenshot 1
SpeedPlayer — screenshot 2
SpeedPlayer — screenshot 3

Funktioner

No. 01

Fast has its thrill; slow has its precision.

01

0.01x to 4.00x dual playback modes (continuous + precision)

02

A-B loop, mirror, zoom, and per-video state memory

03

Video & audio support

MP4, MOV, MKV, MP3, FLAC, WAV, and more

Specifications

Tab. 01

At a glance

Platforms
iPhone
Speed
0.01× – 4.00× precise playback
Loops
A-B loops with per-video settings
Extras
Mirror & zoom, local-first playback

Arbejdsproces

No. 02

How a hard passage gets conquered.

  1. 01

    Load practice material

    Import lesson videos or audio; playback is local and format-agnostic.

  2. 02

    Mark an A-B loop

    Ring the toughest bars, loop them, and drop to 0.08x to follow along slowly.

  3. 03

    Climb back to full speed

    Step back up to 1x as it settles. Per-video memory keeps your progress for tomorrow.

Tillid og privatliv

No. 03

Practice material stays local.

Privatliv først

Local-first: no account, no ads, no tracking — data never leaves the device.

Ingen konto nødvendig

No sign-up, no login. Install it and it just works.

Virker offline

Everything core runs offline; no network required.

Practice is the art of repetition. SpeedPlayer makes repetition precise — 0.01x stepping, looping, per-video memory — while keeping data on device. You just focus on the passage at hand.

product direction

No. 04

Where this app is headed, in the maker’s own hand.

01

Precision Speed

Continuous and precision playback modes for practice.

02

Repeat Sections

A-B loop, mirror, zoom, and per-file state memory.

03

Media Coverage

Supports common video and audio formats for learning and rehearsal.

Om SpeedPlayer

No. 5

The longer story — what it is, who it is for, and the choices behind it.

Sidst opdateret: 23. april 2026

SpeedPlayer er en øvelsesorienteret medieafspiller, der er bygget til brugere, som vil studere deres egne video- og lydoptagelser med præcis hastighedskontrol i stedet for at administrere et stort mediebibliotek.

Grundlæggende retning

  • Indlæs video eller lyd fra Fotos, Filer, et direkte medielink, eller åbn fra andre apps
  • To afspilningstilstande: fortsat tilstand (0,25x–4,00x, lyd bevaret) og præcisionsgennemgangstilstand (0,01x–0,24x, ultra-langsom, lyd slået fra)
  • Bevar A-B-loop, spejling, visningsområde og afspilningshukommelse pr. video
  • Rene lydfiler viser en dedikeret visualisering af en vinylplade, hvis rotationshastighed matcher afspilningshastigheden

Produktgrænser i Stage 1

  • SpeedPlayer er ikke en NAS-browser, eksportstudie eller AI-træner i Stage 1
  • SpeedPlayer er ikke en generel webbrowser og tilbyder ikke et offentligt indholdsfeed eller en søgbar katalog
  • Produktet fokuserer på hurtig import, hurtig genoptagelse og gentagen forfining af ét klip
  • Lokale filer og afspilningstilstand forbliver som standard på enheden

Understøttede medier

Videoformater

SpeedPlayer understøtter følgende videoformater: MP4, MOV, MKV, M4V og HLS-streams.

Lydformater

SpeedPlayer understøtter også rene lydfiler: MP3, AAC, M4A, FLAC, WAV og AIFF. Lydfiler registreres automatisk og afspilles med en dedikeret lydvisualisering.

Formatvalidering

SpeedPlayer bruger systemets medieramme til at validere filer. Hvis en fil ikke er i et kompatibelt format, importerer SpeedPlayer den ikke.

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docs support

No. 6

Plain-language documents. No fine print you would be surprised by.

SpeedPlayer Om SpeedPlayer SpeedPlayer Børn og forældre SpeedPlayer Contacts & Groups SpeedPlayer Privatlivspolitik SpeedPlayer Servicevilkår SpeedPlayer support center

faq title

Some skills live below normal hearing speed: a fast lick on guitar, a dance transition, a bird's call. Precision mode (0.01x–0.24x) slows audio and video down to a crawl without changing pitch, so your ear can follow what full speed blurs past.

Continuous mode sweeps 0.25x–4.00x for normal fast/slow viewing. Precision mode steps 0.01x–0.24x for dissecting a single passage. Together they cover the full 0.01x–4.00x range, and you can pair either with A-B loops on the hard bar.

Yes — per-video state memory keeps speed, position, loop marks, and view settings for every file. Reopen a practice clip tomorrow and it resumes exactly as you left it, mirror and zoom included.

Common video and audio containers both: MP4, MOV, MKV for video; MP3, FLAC, WAV and more for audio. Language drilling and music practice work the same — the player does not care whether your practice material has a picture.

Yes — local-first by design. Your files and your practice history never leave the phone; there is no account and nothing to upload.

Start at 0.01x, finish at full speed.

SpeedPlayer

iOS. Download on the App Store.

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