Catalogue/Mobile apps/MonTri

MonTri

Swipe to sort your photos.

Clean up your gallery with a single gesture: right to keep, left to delete. MonTri runs 100% locally on your device, no photo is ever uploaded to the cloud.

Download on theApp StoreGet it onGoogle Play
v1.0.2Version
iOS & AndroidPlatform
LiveStatus
PhotoCategory
Inside this edition

Gallery sorting, at thumb speed.

No.01

Swipe sorting

Right to keep, left to delete. An intuitive interface to clean your gallery in just a few minutes.

No.02

Trash review

Before any permanent deletion, review the photos again. Change your mind and recover an image at any time.

No.03

Filter by date or album

Precisely target the images to sort by filtering by period or folder, without scrolling through everything.

No.04

Sort by size or date

Sort photos by date or file size to spot the largest ones and free up the maximum amount of space.

No.05

100% local processing

Every operation happens on your device. No photo is transferred to a server or the cloud.

No.06

Privacy-focused

No account, no data collection, no tracking. Clean your gallery with complete peace of mind.

Why MonTri?

A smartphone gallery overflows with useless shots: duplicates, blurry photos, forgotten screenshots, failed selfies. Storage fills up, the device slows down, and finding an important photo becomes a headache.

MonTri solves this with an ultra-fast swipe interface, right to keep, left to delete, using gestures you already know. Everything is processed locally: no image is sent to the cloud. Filter, sort by size, review the trash before deleting. Free, with a one-time purchase for the Premium version.

In brief
What is MonTri?

MonTri is a free photo-gallery cleaning app for iOS and Android. Users sort their photos with a gesture: right to keep, left to delete. All processing happens locally on the device, with no cloud and no account. A trash review step protects against accidental deletions.

Frequently asked

Everything people ask us.

Is MonTri an alternative to Slidebox or Gemini Photos?
Yes. MonTri offers the same swipe-based sorting as Slidebox or Gemini Photos, but 100% on-device: no photo is uploaded to the cloud.
How much space can I free up?
In about ten minutes of swiping, most users recover several gigabytes by deleting duplicates and unused screenshots.
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Clean your gallery.

Free on the App Store and Google Play. No account, no photo in the cloud.

Download on theApp StoreGet it onGoogle Play

In brief

How does MonTri free up storage on a phone?

MonTri brings swipe-based sorting to the photo gallery: swipe right to keep, swipe left to move to trash. The app loads the camera roll in batches of 50 photos to stay fluid even on galleries exceeding 30,000 images. After a session, the user goes through a review trash where each deletion can be undone before final commit — no photo is permanently deleted without explicit confirmation. Based on internal user data, a 10-minute session sorts on average 350 to 500 photos and recovers between 1.2 GB and 4 GB of storage depending on image resolution. MonTri offers filters by date, album, file size, or video length to target the heaviest consumers in the gallery first.

Why does MonTri never upload photos to the cloud?

MonTri processes the full sorting flow locally on the device: no photo is ever transferred to a server, no hash is sent for analysis, and the app requires no network access to function. This architecture guarantees that sensitive photos — ID documents, medical pictures, screenshots of passwords — stay strictly on the device, with no risk of leak through a third-party service. The permissions MonTri requests are limited to read-write access to the photo gallery (required to delete) and do not include microphone, location, or calendar access. The app is free, with no ads and no in-app purchases at launch, funded by mcsÉdition as part of its strategy of free products supported by the broader product ecosystem.

Frequently asked questions

Is MonTri an alternative to Slidebox or Gemini Photos?

Yes. MonTri offers the same swipe-based cleaning as Slidebox or Gemini Photos, but processes everything 100% on-device — no photos are uploaded to the cloud.

How much space can I free up?

In about 10 minutes of swiping, most users recover several GB by deleting duplicates and unused screenshots.

MonTri — Smart Photo Gallery Cleaner | mcsÉdition