Cozie vs Signl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cozie
This app facilitates real-time surveys on the Apple Watch, collecting comfort data tagged with location. It integrates with Apple HealthKit to gather additional health metrics like heart rate and step count. The open-source nature encourages adaptation for research purposes.
- Real-time surveys on Apple Watch
- Location-tagged responses
- Apple HealthKit integration
- Collects heart rate, blood oxygen, steps
- Open-source code for research adaptation
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Cozie is an iOS App for for human comfort data collection. It is extremely useful for conducting right-here-right-now surveys on the Apple Watch. The survey responses are tagged with the location. In addition, Cozie also connects also to Apple HealthKit to retrieve additional information. The health data from Apple HealthKit includes, heart rate, blood oxygen level, environmental sound levels, step count, walking distance, weight, body mass index, among others. This app is meant as a demo for researchers who are interested in this technology. The source-code is open-source and we encourage the community to adapt the app to their research needs.
Signl
Visualize your home Wi-Fi signal strength in 3D using your phone's camera or imported floor plans. Identify dead zones and optimize router placement for a flawless connection throughout your home.
- 3D Wi-Fi signal visualization
- LiDAR room scanning
- Floor plan import (photo/PDF)
- Wi-Fi coverage mapping
- Network diagnostics
- Router/extender placement optimization
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See your WiFi painted onto a 3D map of your own home. Walk through your rooms with your iPhone. Signl measures the real signal in each one and shows you exactly where it drops, and where to move your router to fix it. WHAT YOU GET - 3D scan: walk through your home and watch the model build itself. LiDAR is used on iPhones that have it. - No LiDAR? Import a floor plan. Drop in a photo or a PDF and Signl reads the rooms. - Coverage map: every room measured and scored, weak spots marked where they actually are. - Live test: real speed and latency, measured from where you stand. Other apps give you a number. Signl gives you a place. Each measurement sits on the room it was taken in, so you know which wall is in the way and where the router belongs. YOUR SCANS STAY ON YOUR IPHONE The 3D model of your home never leaves your device. Nothing is stored on our servers. Floor plan photos are analyzed, then discarded. FREE AND PRO Scanning your home and building the 3D model are free. Signl Pro unlocks the full coverage heatmap, scores for every room, router placement recommendations and shareable reports. Signl Pro auto-renewable subscriptions: Yearly ($34.99/year) or Weekly ($5.99/week). A Lifetime purchase is also available. Payment will be charged to your Apple Account at confirmation of purchase. Your subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings at any time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://signlwifi.com/privacy
Screenshots
Verdict
The clearest difference is rating: Cozie at 5.0 against Signl's 4.5. Cozie also leads on in-app purchases (none vs 2) and iOS requirement (16.0 vs 18.0). Signl's advantage is update cadence (weekly vs monthly). On price, ratings volume, 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. Signl sells 2 in-app purchases, starting at $4.99 per 7 days. Cozie asks for nothing beyond the download.
Cozie holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
Cozie ships an update monthly, Signl weekly. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.
| Parameter | Cozie | Signl |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 2 — better |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Clayton Miller | Victor Backouche |
Customer experience
Cozie
Signl
In-app purchases
Cozie
No in-app purchases
Signl
- Signl Pro — Weekly$4.997 Days
- Signl Pro — Yearly$24.991 Year









