Klinthe video compressor for iPhoneBig videos.
Tiny files.

Your phone isn't full of photos. It's full of video. Klin finds your largest videos and shrinks them up to 70% on the device, with the quality, date, location and albums intact.

See the savings
iPhone & iPhone Duo On-device, nothing uploaded $1.99 once, no subscription

A 1.95 GB 4K clip becomes 585 MB. 1.37 GB back, same memory.

Before & after

Shrink videos, not memories.

One minute of 4K takes about as much room as 150 photos. Klin re-encodes the same footage with a more efficient codec at the quality you pick, and shows the new size before it starts.

Try the presets on a real clip from the app.

IMG_0042.MOV4K · 0:24 · in iCloud
Before1.95 GB
After261.9 MB
1.69 GB freed Estimates from Klin. Savings vary by video.
How it works

Space back, in three steps.

Klin works entirely on your iPhone. It only asks for your photo library so it can find big videos and put the smaller ones back.

Klin on iPhone Duo unfolded: a storage bar where video takes most of the space, titled Video is what fills a phone
01 · FIND

See what fills your phone.

Video takes most of your storage. Klin lists your largest videos first, with size, length, resolution and whether each one lives on the phone or in iCloud.

Klin on iPhone Duo folded: a 420 MB video with 780 MB freed, titled Klin re-encodes it, smaller
02 · SHRINK

Pick a quality, see the new size.

Same footage, a more efficient codec and a quality level you choose. Klin shows the estimated size before it starts, and the original next to the result when it's done.

Klin on iPhone Duo unfolded: It goes back in your library, with the same date, location and albums
03 · KEEP

Saved back to your library.

The smaller video goes to Photos with the same date, location and albums. The original moves to Recently Deleted, so you have 30 days to change your mind, or you can tell Klin to keep it.

Inside the app

A dashboard of what you've saved, your biggest videos first, presets or full control, and progress you can watch.

Klin dashboard showing 11.14 GB total space saved across 7 compressed videos, with recent activity
See how much space you've freed
Compress Video screen with details for a 1.95 GB, 24-second 4K video in iCloud, with Play Video and Delete buttons
Your largest videos, found for you
Quality presets: High about 1.17 GB, Medium recommended about 261.9 MB, Low about 81.9 MB, with estimated savings of 1.69 GB
Presets, or customize every detail
Processing screen with a circular progress ring at 34% and a Cancel Compression button
Real-time progress
Features

Everything it takes. Nothing it doesn't.

Smart compression

Finds your largest videos and cuts them about 70% on average. Handles 4K, 1080p, 720p and SD.

Full control

High, Medium or Low presets, or set resolution, frame rate (60, 30 or 24 fps) and bitrate yourself. Klin remembers your choice.

Private by design

Every video is compressed on your iPhone. Nothing is uploaded, there's no account, and Klin collects no data.

Memories intact

The smaller video keeps its creation date, location and albums, so it stays in the same place in Photos.

iCloud videos too

Compress videos stored in iCloud Photos as well as on the phone. Smaller files save iCloud space as well.

Track your savings

A dashboard shows the total space freed, a history of every compressed video and the settings used.

HEVC (H.265)

Use the modern HEVC codec for maximum compression: the same picture in far fewer bytes than H.264.

30 days to undo

Originals go to Recently Deleted, not straight to the void. Or keep them; it's your call.

Ready for iPhone Duo

Layouts made for the unfolded screen, so there's more room for your videos and their details.

At a glance

Klin, in short.

Klin is a video compressor for iPhone. It finds the videos taking the most space in your photo library and re-encodes them smaller, by up to 70%, entirely on the device. The smaller copy goes back into Photos with the same date, location and albums, and the original moves to Recently Deleted. Choose a High, Medium or Low preset, or set resolution (4K, 1080p, 720p or SD), frame rate (60, 30 or 24 fps), bitrate and the HEVC (H.265) codec yourself, and see the estimated size before you start. It costs $1.99 once, with no subscription, no in-app purchases and no data collection.

Price
$1.99 once
Subscription
None, no in-app purchases
Devices
iPhone, iPhone Duo
Requires
iOS 17 or later
Processing
On-device, offline
Privacy
No data collected
Category
Utilities, Photo & Video
Version
1.3,
Made by
Anand Raj R, ARRcade

How to compress a video on iPhone

  1. Open Klin and allow photo access. It reads the library to find big videos and writes the smaller copy back. Nothing leaves your iPhone.
  2. Pick a large video. Your biggest videos are listed first, with size, length and resolution.
  3. Choose a quality. Medium (1080p, 30 fps) is recommended. Klin shows the estimated size and the space you'll save.
  4. Compress. The smaller video lands in Photos with the same date, location and albums; the original waits 30 days in Recently Deleted.

Ways to free up video storage

KlinDelete videosUpload to a web compressor
Keep the memoryYes, smallerNoYes
Video leaves your phoneNeverNoYes, to a server
Date, location, albumsKeptGoneOften lost
Undo30 days30 daysVaries
Cost$1.99 onceFreeOften ads or a plan

What is video compression?

Video compression is re-encoding a video so it takes fewer bytes to store. A compressor lowers the bitrate, and optionally the resolution or frame rate, and can switch to a more efficient codec such as HEVC (H.265). In Klin, a 24-second 4K video of 1.95 GB re-encoded at 1080p and 30 fps comes to about 262 MB.

The picture stays watchable because most phone screens, and most clips you share, never show the full 4K detail. That is why compressing is usually a better trade than deleting: you keep the moment and give back most of the space.

Questions

Good to know.

What is Klin?

Klin is a video compressor for iPhone. It finds the videos taking the most space in your photo library and re-encodes them smaller, by up to 70%, on the device. The smaller copy goes back to Photos with the same date, location and albums.

How do I compress a video on my iPhone?

Open Klin, pick a video from the list of your largest videos, choose a quality preset (Medium, 1080p at 30 fps, is recommended) and tap Compress. Klin shows the estimated new size before it starts and saves the smaller video back to Photos.

How much space does Klin save?

Up to 70% per video, about 70% on average, and more at lower settings. In the app, a 24-second 4K video of 1.95 GB comes to about 1.17 GB at High quality, 262 MB at Medium and 82 MB at Low. The result depends on the source video and the settings you choose.

Will compressing make my videos look worse?

Klin keeps quality as high as the settings allow. High keeps the original resolution with a high bitrate, Medium (1080p, 30 fps) looks the same on a phone screen for most clips, and Low (720p, 24 fps) is for videos where size matters most. You can play the video before compressing and compare the result with the original afterwards.

Does Klin keep the date, location and albums of my videos?

Yes. The compressed video is saved to Photos with the original creation date, location and album membership, so it stays in the same place in your timeline and albums.

What happens to the original video?

After compressing, the original moves to Recently Deleted in Photos, where you have 30 days to change your mind. You can also tell Klin to keep the original.

Are my videos uploaded anywhere?

No. Klin compresses videos entirely on your iPhone with Apple's video frameworks. Nothing is uploaded, Klin has no servers, and it collects no data: no analytics, no ads and no account.

Does Klin work with videos in iCloud Photos?

Yes. Klin shows whether a video is on the phone or in iCloud and can compress both. The compressed copy syncs through iCloud Photos like any other video, so it saves iCloud space too.

Which settings can I change?

Resolution (4K, 1080p, 720p or SD), frame rate (60, 30 or 24 fps), bitrate quality and the HEVC (H.265) codec for maximum compression. Klin can remember your choice as the default for future compressions.

How much does Klin cost? Is there a subscription?

Klin costs $1.99 once on the App Store. There is no subscription, no in-app purchases and no ads.

What do I need to run Klin?

An iPhone with iOS 17 or later. Klin also supports iPhone Duo, with layouts made for the unfolded screen. The app is 8.5 MB and in English.

Who makes Klin?

Anand Raj R, an independent developer who publishes apps as ARRcade. Klin launched in January 2026; the current version is 1.3, released in October 2026.

Klin app icon

Keep every video.
Get the space back.

Download Klin and see how many gigabytes your camera roll is hiding.

$1.99 once, no subscription · iPhone · Requires iOS 17 or later