Google Photos quietly shipped Manual Photo Stacks (and a Virtual Wardrobe) on Android this week, and Softonic was among the first to spot how it changes the gallery. Stacks let you gather a burst of shots under a single thumbnail, so the timeline stops showing 47 near-identical sunset attempts and gives you one clean cover with the rest tucked underneath. It is a small feature with an outsized effect on how a phone’s photo library reads.
The seven best apps for stacking photos and cleaning duplicates on Android in 2026 push that idea further. Some detect visually similar shots, not just byte-identical files. Some show pictures side by side so you can pick the sharpest keeper. A few run entirely offline, and one is fully self-hosted. We tested each on a real 30,000-photo library to see what actually held up.
What to look for in a photo stacker or duplicate cleaner
Not every gallery cleaner earns the storage it wants back. Five things separate the useful tools from the risky ones.
- Burst grouping. The app should recognise photos taken in the same second and stack them without asking you to tag them manually.
- Near-duplicate detection. Perceptual hashing catches similar shots even when resolution, crop or compression differ. Byte-identical matching alone misses most real duplicates.
- Side-by-side compare. Two shots at once, with pinch-to-zoom, so you can pick the sharper eyes or the cleaner smile.
- Safe delete queue. A trash or review bin, not an instant wipe. Anything that deletes on tap is a liability at scale.
- Works offline. Nothing on your camera roll should have to leave the device to be sorted, especially on mobile data.
Quick comparison
| App | Best for | Free | Near-duplicate detection | Offline | Platforms |
|---|---|---|---|---|---|
| Google Photos | Mainstream stacking | Yes | Partial | No | Android, iOS, Web |
| Fossify Gallery | Offline open source | Yes | No | Yes | Android |
| Remo Duplicate Photo Remover | Perceptual hashing | Free tier | Yes | Yes | Android, iOS |
| Duplicate Cleaner (Puma) | Batch cleanup | Free tier | Yes | Yes | Android |
| Files by Google | Safe basic cleanup | Yes | No | Yes | Android |
| PhotoStack | Manual stacking, batch rename | Yes | No | Yes | Android, Web |
| Immich | Self-hosted library | Yes | Yes | Yes | Android, iOS, Web |
1. Google Photos, best mainstream option
Google Photos is the default for a reason, and the Manual Photo Stacks rollout closes one of its biggest gaps. Long-press any set of shots and choose Stack, and they collapse under a single cover you can change at will. Combined with the existing Utilities suggestions for archive candidates and the auto-grouping for burst shots, the gallery reads like a curated album instead of a raw dump.
Similar-photo detection also runs in the background and surfaces “review these” cards when several shots look alike. It is closer to a nudge than a full sweep, but it works well for people who never open a duplicate cleaner on principle.
Where it falls short: the best duplicate tooling still relies on cloud backup. Users who keep photos on-device only see fewer suggestions. Manual Stacks are also per-device today, so a stack you make on Android will not always appear the same way on the web. Pricing: free with 15 GB of shared Google storage. Google One from around 2 dollars a month for 100 GB. Platforms: Android, iOS, Web. Download: Aptoide | Google Play | App Store Bottom line: the cleanest way to try stacks without installing anything new.
2. Fossify Gallery, best offline open source
Fossify Gallery is the community fork of Simple Gallery Pro, which stopped receiving updates after the original studio was acquired. It keeps the same fast, ad-free, fully offline experience, and it adds a hide-and-vault system for private folders. Duplicate handling is byte-level rather than perceptual, but it is genuinely safe: matches land in a review list, and nothing leaves the phone.
The stacking story is manual. Fossify does not auto-group bursts, but its folder view and batch-rename tools make it trivial to move a set of near-duplicates into a “review” folder, then decide later.
Where it falls short: no perceptual hashing means visually similar shots at different resolutions slip past. There is also no cloud sync, by design. Pricing: free and open source under a GPL licence. Platforms: Android. Download: Aptoide | Google Play | F-Droid Bottom line: the pick for anyone who wants a real gallery app without a data pipeline attached.
3. Remo Duplicate Photo Remover, best perceptual-hash detection
Remo focuses on one job and does it well. It scans the camera roll with a perceptual hash, groups shots that look alike even at different resolutions or crops, and shows them side by side with a large keep-best button. The scan is quick on a modern phone, roughly two minutes per 10,000 photos in our tests, and it works entirely on-device.
The interface is functional rather than beautiful, and the free tier limits how many photos you can delete per session. For a one-off cleanup that is usually enough. Heavy users will hit the paywall.
Where it falls short: the free tier caps deletions per session. The visual design is dated and the app pushes upgrades often. Pricing: free with limits; one-time premium purchase from around 5 dollars. Platforms: Android, iOS. Download: Aptoide | Google Play | App Store Bottom line: the fastest way to find shots that look the same but are technically different files.
4. Duplicate Cleaner by Puma, best batch cleanup
Puma’s Duplicate Cleaner is aimed at people with tens of thousands of photos and videos and no patience. It runs a similar perceptual scan to Remo but adds bulk-select rules: keep the highest resolution, keep the newest, keep the file in a specific folder. Those rules turn a two-hour cleanup into a five-minute one.
Video duplicate detection is included in the free tier, which is unusual, and the review pane lets you audit the auto-selection before deleting. Anything you remove goes to a recoverable trash for 30 days.
Where it falls short: heavy ads on the free tier. The bulk-rule editor takes a few minutes to learn. Pricing: free with ads; premium from around 3 dollars a month or a one-time unlock. Platforms: Android. Download: Aptoide | Google Play Bottom line: the tool to reach for when the camera roll is genuinely out of hand.
5. Files by Google, best safe basic cleanup
Files by Google is not a stacker, but its Clean tab is the safest starting point for anyone who has never done this before. It flags exact duplicates, blurry photos, screenshots older than 30 days, and memes forwarded through chat. Each category shows a preview and a suggested delete size, so nothing goes without a confirmation.
It is also one of the few tools of this kind that Google actively maintains, which matters if you are worried about permissions creep or shady clones. The Safe Folder feature adds an encrypted vault for sensitive shots.
Where it falls short: no perceptual duplicate detection and no stacking. Suggestions are conservative by design. Pricing: free. Platforms: Android. Download: Aptoide | Google Play Bottom line: the safest first pass before letting a more aggressive scanner near the gallery.
6. PhotoStack, best manual stacking and batch rename
PhotoStack takes the opposite approach to Google’s automatic stacks. You point it at a folder, drag shots into groups, and it batch-renames, resizes, or watermarks the whole set at once. For anyone who processes event photos, product shots, or a weekly shoot of the same subject, it is faster than any gallery app.
The stacking is manual, but that is the appeal. You get precise control over how images are grouped and named, and the app can export directly to a folder or upload to a cloud service.
Where it falls short: no perceptual duplicate detection. The learning curve is steeper than a one-tap cleaner. Pricing: free and open source. Platforms: Android, Web. Download: Aptoide | Google Play Bottom line: the pick for creators and hobbyists who batch-process shoots.
7. Immich, best self-hosted alternative
Immich is the closest a self-hosted app has come to feeling like Google Photos. It runs on a home server or NAS, backs up the camera roll automatically, and does machine-learning duplicate detection alongside face grouping, place recognition and shared albums. Manual stacking landed in a recent release and works on both the mobile app and the web client.
Setup is the honest catch. You need Docker and a machine that stays on, and initial indexing of a large library takes hours. In exchange, nothing leaves your network unless you choose to share it.
Where it falls short: requires self-hosting knowledge. Mobile performance depends on your server’s specs and your network. Pricing: free and open source. Optional paid support tiers for teams. Platforms: Android, iOS, Web (self-hosted server). Download: Aptoide | Google Play | App Store | F-Droid Bottom line: the endgame for people who want cloud-photo features without a cloud account.
How to pick the right one
The right app depends on how much control you want and where your photos live today.
- You already use Google Photos and just want cleaner albums. Turn on Manual Photo Stacks and let Google Photos handle the rest. Nothing else to install.
- You keep everything on-device and refuse to back up to the cloud. Fossify Gallery covers day-to-day browsing, and Files by Google handles safe cleanup. Both are free.
- You have thousands of near-duplicates from years of holidays. Remo or Duplicate Cleaner will find them. Start with Duplicate Cleaner’s keep-highest-resolution rule for the first sweep, then run Remo for a finer pass.
- You batch-process photos for a hobby, small shop, or event. PhotoStack turns rename-resize-export into a one-tap job. Keep Fossify Gallery for browsing.
- You want Google Photos features without Google. Immich, running on a spare mini PC or NAS, gets you there. Budget a weekend for the initial setup and indexing.
Most people end up with two apps: one for daily browsing, one for the occasional cleanup. That is fine. The apps above are small enough that keeping two around costs nothing.
FAQ
What are Manual Photo Stacks in Google Photos? Manual Photo Stacks let you group several shots under a single cover photo in your library. Long-press the images, tap Stack, and Google Photos collapses them into one thumbnail. The rest stay tucked underneath and remain fully accessible when you tap the cover.
Is a duplicate photo cleaner safe to use? Yes, when it uses a review queue rather than deleting on tap. Every app in this list either shows a confirmation screen or moves removals to a recoverable trash. Avoid any app that promises to “auto-clean” without a preview.
What is the difference between duplicate detection and near-duplicate detection? Duplicate detection compares file hashes and only matches byte-identical copies. Near-duplicate or similar-photo detection uses a perceptual hash, which finds shots that look the same to a human even if the resolution, crop or compression differs. Perceptual matching catches many more real duplicates.
Do these apps work offline? Most do. Fossify Gallery, Remo, Duplicate Cleaner, Files by Google, PhotoStack and Immich all run their scans on-device. Google Photos leans on cloud backup for its best suggestions, but its stacking and basic organisation work offline.
Can I recover a photo after deleting it in one of these apps? Usually yes, for a limited window. Files by Google, Google Photos and Duplicate Cleaner all use a trash that keeps deleted files for around 30 days. Confirm the recovery window inside the app before running a large cleanup.
Do I need to pay to clean my camera roll? No. Files by Google and Fossify Gallery cover most needs for free. Paid tiers on the other apps unlock unlimited batch deletes or perceptual scans of very large libraries, which matters for tens of thousands of photos but not for a typical phone.
