Did I lock? vs Snatch Guard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Did I lock?
This utility helps alleviate the anxiety of forgetting to lock your door. Simply tap the app after securing your home, and a history log will confirm your action, saving you a trip back to check.
- Log door locking actions
- Check history of locks
- Reduce post-departure anxiety
- Simple one-tap logging
- Confirmation of secured doors
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If you often think "Did I lock the door?" after you leave home, this app can be a help for your feeling of uncertainty! Here is how it works: - it is very simple "Lock the door then Tap the app"- For example, fifteen minutes after you leave the house, if you start to think "Did I lock the door?". Rather than run back home to check, simply look at your "Lock Checker" app. The check history you made in the app when you locked the door confirms it's done. If there is no check-history, you better go back. "Lock Checker" just saved your day from disaster! No need to check or re-check from today. No worries at all!
Snatch Guard
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Snatch Guard detects the moment someone grabs your phone and instantly locks your sensitive apps — banking, messaging, photos, notes — with a system-level shield that can't be dismissed without your Face ID or passcode. HOW IT WORKS - Detects the grab — the built-in accelerometer senses the sudden jerk when someone snatches your phone. - Locks your apps instantly — system-level shields appear over your selected apps within milliseconds. - Only you can unlock — Face ID or device passcode required to remove shields. - Works in background — protection stays active even while you're using other apps. - Tamper resistant — shields stay active even if the app is force-closed. With Screen Time passcode enabled, the app can't be deleted or bypassed. WHY SNATCH GUARD? In London alone, over 117,000 phones were stolen in 2024. Thieves target unlocked phones — they grab and run, then immediately access your bank accounts, messages, and photos. Apple's Stolen Device Protection only delays password changes — it doesn't protect the content of an unlocked phone. The "Require Face ID" feature only works at app launch — if the app is already open when snatched, there's no protection. Snatch Guard fills this gap. FALSE POSITIVES? If you run for a bus and the shield activates, simply open Snatch Guard, authenticate with Face ID, and remove the shield. Takes 3 seconds. You can also adjust sensitivity in Settings. PRIVACY - No data collection — no analytics, no tracking, no telemetry - No network calls — the app never connects to the internet - Location stays on device — used only to keep background protection active, never transmitted - All processing happens on-device FEATURES - Choose which apps to protect - Adjustable sensitivity (2.0G – 6.0G) - Background protection via location keep-alive - Event log with location of detected incidents - Face ID or passcode unlock - Custom shield appearance - Step-by-step onboarding Free. No ads. No subscriptions. No in-app purchases.
Screenshots
Verdict
The clearest difference is ads: Snatch Guard at none against Did I lock?'s shown. Snatch Guard also leads on update cadence (every 4 days vs every 6 weeks). Did I lock?'s advantage is device support (3 vs 1) and iOS requirement (11.0 vs 17.6). On price, rating, ratings volume and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Did I lock? against 5.0 for Snatch Guard. Both are backed by a comparable volume of ratings — 5 and 2 respectively.
Did I lock? ships an update every 6 weeks, Snatch Guard every 4 days. Both last shipped on October 24, 2026.
| Parameter | Did I lock? | Snatch Guard |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 6 weeks | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 12 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Yusaku Hatakenaka | Oleg Mamiev |
In-app purchases
Did I lock?
No in-app purchases
Snatch Guard
No in-app purchases









