Comparison

Secret Key Lock Album vs Zero Camera

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

Head to head
About

Secret Key Lock Album

Securely store your private photos and videos on your device, keeping them safe from prying eyes. This app offers a private vault with passcode or Face ID protection, ensuring your memories and sensitive content remain confidential. Enjoy a simple interface and robust features for managing your personal media.

Highlights
  • Hide photos and videos
  • Passcode and Face ID unlock
  • Auto-delete function
  • Supports various media types
  • Restore to iPhone Photos
  • High-resolution saving
  • Built-in slideshow
Features
Read full description

The best app to hide photos and videos you don’t want anyone else to see. Your private photos and videos are stored only on your iPhone and never uploaded anywhere. This is the safest way to protect your privacy. You can unlock the photo locker with your passcode or Face ID. It’s one of the top-ranked photo vault apps in Japan. Keep and revisit your favorite photos and videos with an app designed for privacy and simplicity. Recommending Use of Secret Key Lock Album for: - Keeping precious memories - Storing private photos and protecting your privacy - Creating personal collections - Saving important information securely What makes Secret Key Lock Album different? • Clean, simple design with fast performance. Easy for anyone to use. • All core features are available for free. • If you need more storage, the in-app purchase is a one-time payment — no monthly fees or subscriptions. Features: - Instantly move your data with the auto-delete function. - Supports videos, GIFs, Live Photos, Slo-mo, and Time-lapse, with a built-in video player. - You can restore photos and videos back to the iPhone Photos app. - Set any photo as your album cover. - Saves photos in high resolution to keep your memories sharp. - Add notes and comments to your important moments with the memo feature. - Enjoy looking back on your memories with the built-in slideshow. - Share photos and videos through AirDrop, social media, email, messages, and other supported apps. - With Dropbox support, you can transfer your data wirelessly.

About

Zero Camera

Instantly start recording video with a single launch. This app prioritizes speed, automatically beginning video capture upon opening and stopping when you exit. It allows for seamless sharing and captures both video and photos without mode switching.

Highlights
  • Auto-record on launch
  • Auto-stop when leaving app
  • Lock recording orientation
  • Seamless sharing
  • Capture video and photos without switching
  • Secure in-app storage vault (Premium)
Read full description

Start recording video in an instant. That's the whole idea behind this app. It launches incredibly fast — and not just fast. Once launched, recording starts automatically with zero interaction required. After stopping a recording, you can seamlessly share to other apps and social media. You can capture both video and photos at any time without switching modes. All of the above is available for free, no special purchase required. Built with all the know-how developed in our sister app "Mugen Camera" over several years. Mugen Camera records as long as possible. Zero Camera starts recording as fast as possible. We hope you enjoy both! [Key Features] 1. Auto-record on launch. No tapping needed. [Super convenient!] 2. Auto-stop recording when you leave the app (home screen or switch apps). 3. Lock recording orientation. Record in your preferred direction regardless of device orientation. 4. Seamlessly share to external apps and social media after stopping. [Super convenient!] 5. Saves to your Photo Library just like the built-in camera. 6. All the video recording expertise from our popular sister app [Mugen Camera] — 3+ years of development. 7. Secure in-app storage vault with privacy protection. (Premium) 8. Screen Saver feature loved in Mugen Camera. (Premium) 9. Restores zoom level, quality, and other settings automatically on relaunch. 10. Auto-mirror video from the front camera. 11. Capture video and photos anytime without switching. [Super convenient!] [Optimized Architecture] Launch and resume processing are parallelized to the maximum. Takes full advantage of modern multi-core CPUs. [Premium Features (Paid)] 1. Change recording quality 2. Change frame rate (fps) 3. Screen Saver (covers the screen with a dark full-screen or custom image) 4. Pinch to zoom 5. Tap to set focus and exposure [Bonus] Remove in-app ads

Screenshots

Secret Key Lock Album4 screens
Zero Camera4 screens

Verdict

The call

The clearest difference is update cadence: Zero Camera at every 2 weeks against Secret Key Lock Album's every 3 months. Secret Key Lock Album's advantage is ratings volume (7.7K vs 4) and iOS requirement (14.0 vs 17.0). On price, rating, review sentiment and ads 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. Secret Key Lock Album sells 2 one-off in-app purchases and Zero Camera sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Zero Camera holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Secret Key Lock Album has 7.7K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 82% of Secret Key Lock Album's written reviews are positive against 77% of Zero Camera's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Secret Key Lock Album ships an update every 3 months, Zero Camera every 2 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard3 real differences · 7 level
Secret Key Lock Album versus Zero Camera: the parameters behind the verdict, then further details
ParameterSecret Key Lock AlbumZero Camera
PriceFreeFree
Rating4.8 (7.7K ratings)5.0 (4 ratings) — better
Positive reviews82.3% of reviews — better77.3% of reviews
Number of ratings7.7K — better4
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 — better17.0
Further details — not scored
Size87 MB46 MB
Age rating4+4+
DeveloperMs, Inc.Koichiro Kamada

Customer experience

Secret Key Lock Album

All ratings7,657 ratings
Positive95.3%
Neutral2.6%
Negative2.2%
Written reviews379 reviews
Positive82.3%
Neutral6.9%
Negative10.8%

Zero Camera

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews22 reviews
Positive77.3%
Neutral4.5%
Negative18.2%

Bugs and requests

Secret Key Lock Album

Reported bugs

3 issues
  • App crashes after update
  • Photos lose original timestamps when moved
  • Deleted photos/videos not recoverable

Requested features

5 requests
  • Add music support for slideshows
  • Implement picture-in-picture for videos
  • Allow cropping photos within the app
  • Provide a 'recently deleted' feature
  • Add sorting and selection options

Zero Camera

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Secret Key Lock Album

One-time2
  • Remove Banner Ad$0.99
  • Remove Save Limit$3.99
1 purchases

Zero Camera

One-time1
  • プレミアム機能$5.99

Questions

Is Secret Key Lock Album free?
Secret Key Lock Album is free to download, with in-app purchases available.
Is Zero Camera free?
Zero Camera is free to download, with in-app purchases available.
Which has better reviews, Secret Key Lock Album or Zero Camera?
Zero Camera is rated higher. Secret Key Lock Album averages 4.8 out of 5 from 7.7K ratings, while Zero Camera averages 5.0 from 4 ratings.
Do Secret Key Lock Album or Zero Camera have ads?
Both Secret Key Lock Album and Zero Camera show ads.
Which is updated more often, Secret Key Lock Album or Zero Camera?
Secret Key Lock Album ships an update every 3 months, and Zero Camera every 2 weeks. Most recently, Secret Key Lock Album was updated on November 1, 2026 and Zero Camera on November 2, 2026.

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