Comparison

Trigger Keeper vs Mosine

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

Head to head
About

Trigger Keeper

Features
Read full description

Prop your phone anywhere, step into the frame or keep your hands on the job, and say the word. Trigger Keeper hears it and takes the photo. No timer sprint, no asking strangers, no one missing from the picture. HOW IT WORKS Pick up to three trigger words. Any words you like, from "cheese" to something only your family says. Frame the shot and tap Play. Trigger Keeper starts listening. Say the word. The flashlight blinks so everyone knows it heard you, and the shutter fires. Or just smile. With Smile to shoot on, it takes the photo when everyone in frame is smiling. MADE FOR REAL PHOTOS Your word, not a wake phrase. No "Hey Siri" required. Works in English, Spanish, and Chinese. Burst mode takes three shots in a row, so blinks and mid-laugh frames don't cost you the photo. Live Photo support captures the moment around the moment. 0.5x ultra-wide to 6x zoom, with pinch or one-tap lens presets. 4:3, square, and 16:9 framing. The volume buttons and Camera Control work as a manual shutter. PRIVATE AND LOCAL Speech recognition and smile detection run entirely on your iPhone. Trigger Keeper contains no networking code at all. It cannot send your audio, your photos, or anything else anywhere. No account. No ads. No analytics. It works in airplane mode, because nothing it does ever needed the internet. Listening stops when you tap Stop, when you leave the app, or after 10 quiet minutes. A note on permissions: Trigger Keeper asks for full photo library access only because creating and managing its own album requires it. The gallery shows only the Trigger Keeper album. Your other photos are never read. GOOD FOR Family gatherings and holiday photos. Group shots where the photographer finally gets to be in them. Solo creators who need a camera operator. Anyone tired of the 10-second timer dash. Hands-busy moments: under a sink, up a ladder, or mid-repair, when you need a clear photo of a part to send to a colleague or customer. Requires iOS 17.2 or later. Ultra-wide and telephoto options appear on devices that have those lenses.

About

Mosine

This app helps you declutter your photo library by presenting photos taken on this day in past years. You can easily select and delete unwanted pictures in batches, making photo management a simple daily ritual. It prioritizes privacy, keeping all your photos on your device.

Highlights
  • Daily photo memories
  • Batch photo deletion
  • Intuitive photo selection
  • Privacy-focused design
  • Lifetime cleaning stats
  • Optional daily reminders
Features
Read full description

Every day, Mosine shows you the photos you took on this exact day in every past year. Relive them, keep the ones that matter, and clear the rest in a single batch. Cleaning a photo library all at once is overwhelming. Mosine turns it into a small daily ritual: a few minutes with today's memories, a lighter library every day. Mo, a little black cat, shows you around the first time and keeps you company along the way. HOW IT WORKS • Open the app and see this day across all your years, newest first • Tap a photo and swipe to decide: left to mark it, right to keep it • Undo steps back one photo, and nothing is deleted until you confirm • Or tap Select and mark photos one by one or a whole year at once • Delete everything you marked in one batch, with a single iOS confirmation • Deleted photos stay in Recently Deleted for about 30 days, so nothing is lost by accident MADE FOR IPHONE • Feels like the Photos app: familiar gestures, same selection style, pinch to zoom • Videos play right in the review, including ones stored in iCloud • Share a photo as a memory, with a slim "7 years ago today" band below it, never cropped • Mark favorites from the viewer, synced with your real Photos favorites • Optional daily reminder so your memories come to you • Your progress: see how much space you have freed MOSINE PLUS A one-time purchase, no subscription, yours forever: • Pick any day of the year and see it across all your years • Catch up on yesterday in one tap, and peek at tomorrow • Turn up to 9 photos into a montage to share Every new user gets Mosine Plus free for 7 days. Everything else in Mosine is free. PRIVATE BY DESIGN Your photos never leave your device. Mosine has no servers, no accounts, no ads and no tracking. Its only network use is the App Store, for the optional Mosine Plus purchase. Deleting always goes through the standard iOS confirmation, and Mosine never deletes anything on its own. Mosine needs Full Access to your photo library to find your photos from every year. Relive. Choose. Keep.

Screenshots

Trigger Keeper4 screens
Mosine4 screens

Verdict

The call

The clearest difference is price: Mosine at Free against Trigger Keeper's $4.99. Mosine also leads on iOS requirement (15.0 vs 17.2). Trigger Keeper's advantage is in-app purchases (none vs 1). On update cadence, ads 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

Mosine is free to download; Trigger Keeper costs $4.99 up front. Mosine sells 1 one-off in-app purchase. Trigger Keeper asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 7 level
Trigger Keeper versus Mosine: the parameters behind the verdict, then further details
ParameterTrigger KeeperMosine
Price$4.99Free — better
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhoneiPhone, iPod — better
Requires iOS17.215.0 — better
Further details — not scored
Size3 MB29 MB
Age rating4+4+
DeveloperBrian UkestadJULIO HENRIQUE DO FRANCA

In-app purchases

None

Trigger Keeper

No in-app purchases

1 purchases

Mosine

One-time1
  • Mosine Plus$4.99

Questions

Is Trigger Keeper free?
Trigger Keeper costs $4.99, with no in-app purchases.
Is Mosine free?
Mosine is free to download, with in-app purchases available.
Do Trigger Keeper or Mosine have ads?
Neither Trigger Keeper nor Mosine shows ads.
Which is updated more often, Trigger Keeper or Mosine?
Trigger Keeper ships an update every 2 weeks, and Mosine every 2 weeks. Most recently, Trigger Keeper was updated on November 7, 2026 and Mosine on November 6, 2026.

Other comparisons