Comparison

Video Buffer Pre vs Duo Video

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Video Buffer Pre

Capture moments that have already happened with a pre-recording buffer. Save device storage and avoid tedious editing by recording only the highlights. Ideal for sports, events, or unexpected occurrences.

Highlights
  • Buffered video recording
  • Up to 100 seconds buffer time
  • DualCam Mode
  • 4K video quality
  • Apple Watch remote support
  • Slow-motion support
Features
Read full description

Record the action that happened before the shutter! Save your device storage and skip the tedious post-game editing! Never miss a moment again! Yes, it really records in 4K: up to 4K at 120 fps on recent iPhones (e.g. iPhone 17) and 4K at 60 fps on older models (e.g. iPhone 12), with your Apple Watch as a remote. We're all used to pressing the record button and capturing life as it happens. But what if you could record things that already happened, pressing the button to catch the last few seconds? That's what makes Video Buffer so unique — you set the buffer time and hit the record when something interesting happens. You haven't missed a thing and saved your time and device storage! Video Buffer can be vital in all kinds of ways: Sports coaches and parents can use the app to record in-game highlight moments as they happen. Physical Education teachers could use buffered video footage to analyze performance and settle disputes between players. Sports officials and referees can review their decisions using a Buffer Camera as a video assistant. Drivers can use Video Buffer as a Dashcam, recording unexpected events on the road without overloading device memory storage. Skateboarders can capture only good lands and save time scrolling through many similar frames on the camera roll. Parents can catch their kids playing, making it easy to record that funny interaction that might otherwise be lost. Nature lovers can save time and storage while filming astonishing lightning flashes or waiting for the animal to appear or strike a funny pose. Video Buffer features include: - buffered video recording that ensures you'll never miss a moment - long buffer time, up to 100 seconds - 3 recording buttons, each with adjustable buffer time - DualCam Mode - record front and back camera footage simultaneously - option to capture only the buffer - the recording will end & save automatically - 4K video quality: up to 4K 120 fps on recent iPhones, 4K 60 fps on older models such as iPhone 12 - custom video resolution and FPS (30-240) - portrait or landscape orientation - saving to iCloud or device folders with a custom prefix for the filenames - Apple Watch support — a remote on your wrist to make it easier than ever to hit that record button - Slow-motion support - gives sports and fitness trainers the best look at swing, ball movement, or technique. Note: Works only with some back cameras - set 240 FPS in Settings. If you've ever missed something because you couldn't hit a record in time, Video Buffer is the answer! Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

About

Duo Video

Features
Read full description

DuoVideo lets you record with both the front and back cameras at the same time. Every session produces three separate files: a picture-in-picture composite, a clean back-camera clip, and a clean front-camera clip - all synchronized to the same timecode. - Simultaneous front and back camera recording powered by Multi-Camera capture - Picture-in-picture composite saved alongside two independent raw tracks - Choose between 720p, 1080p, and 4K resolution - Select 24, 30, or 60 frames per second - Switch between video and photo mode at any time - Mirror control for the recorded output - Configurable PiP position: front camera or rear ultra-wide - Auto-save recordings directly to your Photos library - All recordings organized in a built-in file browser with share support - Lifetime unlock available as a one-time purchase - Requires a device that supports Apple Multi-Camera capture (iPhone XS or later recommended).

Screenshots

Video Buffer Pre4 screens
Duo Video2 screens

Verdict

The call

The clearest difference is ads: Video Buffer Pre at none against Duo Video's shown. Duo Video's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Video Buffer Pre sells 3 in-app purchases, starting at $4.99 per 7 days and Duo Video sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Video Buffer Pre ships an update every 6 weeks, Duo Video every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Video Buffer Pre versus Duo Video: the parameters behind the verdict, then further details
ParameterVideo Buffer PreDuo Video
PriceFreeFree
Rating4.5 (46 ratings) — better—
Positive reviews63.3% of reviews—
Number of ratings46 — better—
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size27 MB15 MB
Age rating4+4+
Developermichal bojanowiczJiangsu Mingbin Jingzhi Technology Co., Ltd

In-app purchases

3 purchases

Video Buffer Pre

Subscriptions3
  • Weekly$4.997 Days
  • Monthly$5.991 Month
  • Yearly$29.991 Year
1 purchases

Duo Video

One-time1
  • Lifetime Unlock$9.99

Questions

Is Video Buffer Pre free?
Video Buffer Pre is free to download, with in-app purchases available.
Is Duo Video free?
Duo Video is free to download, with in-app purchases available.
Do Video Buffer Pre or Duo Video have ads?
Duo Video shows ads; Video Buffer Pre does not.
Which is updated more often, Video Buffer Pre or Duo Video?
Video Buffer Pre ships an update every 6 weeks, and Duo Video every 3 weeks. Most recently, Video Buffer Pre was updated on November 3, 2026 and Duo Video on October 31, 2026.

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