Color Alerts vs RollGuard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Color Alerts
This utility app uses your device's camera to detect specific colors and trigger custom alerts when those colors are visible. It offers adjustable zoom and capture area settings for precise detection without any extra hardware.
- Camera-based color detection
- Customizable alerts for favorite colors
- Adjustable zoom and capture diameter
- Save and manage multiple favorite colors
- No additional equipment required
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Color Alerts makes it easy to receive alerts when your favorite colors are detected. Use the Capture button at the bottom center of the screen to save the color currently visible within the capture area. Once a color is captured, you can choose the alert or vibrate option you would like to hear or feel whenever the camera detects that color. Your saved colors can be viewed and managed by selecting the Saved Colors icon in the upper-left corner of the screen. From there, you can enable or disable individual colors, allowing you to choose exactly which saved colors you want Color Alerts to monitor. For more accurate color detection, Color Alerts provides several ways to fine-tune what the camera is monitoring. Adjust the zoom above the Capture button, change the size of the capture area using the control on the right side of the screen, or use the Custom Controls panel to fine-tune your color selection and detection settings. Once your color and detection settings are configured, simply position your device where you want it to monitor. When one of your enabled colors appears within the capture area, Color Alerts will notify you with your selected alert.
RollGuard
This app scans your camera roll for sensitive documents like IDs, credit cards, and password screenshots. It works entirely on your device, even in Airplane Mode, and helps you manage private images before selling a device or sharing your phone.
- Scans for IDs, credit cards, and password screenshots
- On-device scanning, works offline
- Flags sensitive photos like WiFi labels
- Supports documents from 180 countries
- Option to keep, hide, or delete flagged images
- Free tier scans last 30 days completely
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Find the sensitive photos hiding in your camera roll before someone else does. RollGuard scans your photos for passports, driver's licenses, national ID cards, payment cards — including card backs — screenshots of passwords and credentials, photographed WiFi and router labels, and other private images — entirely on your iPhone. It even scans in Airplane Mode — proof that nothing is uploaded, nothing is analyzed in the cloud. There's no account to create. Review what's flagged, then keep, hide, or delete — you're always the one who decides. RollGuard finds identity documents wherever they're hiding in your camera roll — passports, national ID cards, driving licenses, health and tax documents, residence permits — built and tested against real specimen documents from 180 countries and territories, in more than 30 languages. It doesn't just spot things that look like documents: passports and modern ID cards from any country are read and checked against their own machine-readable rules, and anything it can't verify is still flagged for you to decide. Passports from 100 MRZ-verified states have checked out against their own check digits in testing. Deep coverage for Australia, New Zealand, the UK, Ireland, Canada and the US, broad coverage across Europe — and growing. Before you hand over your work phone. IT prepping a device for return, or handing one back yourself — a fast scan flags anything private that shouldn't travel with the hardware. Before you sell or trade it in. Old passwords, screenshotted 2FA codes, a photo of your license from years ago — RollGuard finds what a factory reset alone won't help you notice before it's gone for good. Before you hand your phone to family. Kids playing games, family scrolling through photos — a quick pass first means nothing private turns up by accident. Before you travel. A lighter camera roll for border crossings and unfamiliar hands. Or just a spring clean. "What's actually in my thousands of photos?" — most people genuinely don't know. Find out what's hidden in there. RollGuard's free tier does more than a typical free trial: it runs a genuinely complete scan of your last 30 days — every category, every action, no artificial limits inside that window, re-scannable anytime — with the full review queue included: real thumbnails, tap to zoom, and keep, hide, or delete, all free. It also keeps going: working through the rest of your library on its own, showing you a real running count of what's flagged out there. Pro unlocks the review queue for everything beyond your last 30 days — without it, finding a specific older flagged photo yourself would mean scrolling through thousands of images by hand; Pro does that for you. One-time purchase, forever: no subscription, no recurring charges, ever. RollGuard also flags possibly sensitive images using Apple's own on-device detection, following your iPhone's Sensitive Content Warning setting — nothing about those images ever leaves your phone either. RollGuard never tells you your library is "safe." It flags what it finds for your review — you make every call.
Screenshots
Verdict
The clearest difference is in-app purchases: Color Alerts at none against RollGuard's 1. Color Alerts also leads on iOS requirement (16.4 vs 26.0). RollGuard's advantage is update cadence (every 4 days vs monthly). On price, 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
Both are free to download. RollGuard sells 1 one-off in-app purchase. Color Alerts asks for nothing beyond the download.
Color Alerts ships an update monthly, RollGuard every 4 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.
| Parameter | Color Alerts | RollGuard |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Number of ratings | — | 4 — better |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 39 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Furtive Technology | David Smith |
In-app purchases
Color Alerts
No in-app purchases
RollGuard
- RollGuard Pro$19.99









