CompareImage vs ColorMetric
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CompareImage
Easily compare two images side-by-side to decide which one is better. Delete unwanted pictures directly within the app to keep your device organized with only your best photos.
- Side-by-side image comparison
- Delete unwanted images
- Organize photo library
- User-friendly interface
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Many of us prefer to keep images side by side to compare which ones we like and which ones we don’t. The Compare Image App allows you to view two images side by side for easy comparison. If you decide you don’t like one of the images, you can easily delete it by clicking the delete button located in the top right corner of the image. It's better to keep only the nice images on your device rather than cluttering it with worthless ones.
ColorMetric
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Water Testing, Perfected for Your Eyes and Your Environment. Are you tired of squinting at paper charts trying to decide if your Nitrate is 10 or 20? ColorMetric transforms your iPhone into a professional-grade colorimeter. Designed for both freshwater enthusiasts and reef-keepers, our app eliminates the subjectivity of traditional testing. What makes ColorMetric different? Intelligent Lighting Calibration: Room lighting often distorts colors. ColorMetric allows you to calibrate the app to your specific environment, ensuring your camera "sees" the same color every time, regardless of whether you’re under LEDs or sunlight. Individual Card Calibration: Every test kit brand has slight variations. You can calibrate the app to your specific test cards for unparalleled accuracy. Guided Test Assistant: Never botch a 5-minute wait again. The app walks you through every step of the testing process with integrated timers and clear instructions for every parameter. Dual Environment Support: Specialized profiles for Saltwater and Freshwater aquariums, covering everything from pH and Ammonia to high-sensitivity Reef parameters like Phosphate and Magnesium. A Healthier Tank Starts with Better Data Accuracy is the difference between a thriving ecosystem and a crash. ColorMetric bridges the gap between affordable liquid tests and expensive digital monitors, giving you the precision you need at a fraction of the cost. Download ColorMetric today and stop guessing. Privacy Policy URL: https://colormeter.web.app/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: CompareImage at none against ColorMetric's 1. CompareImage also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). ColorMetric's advantage is ads (none vs shown) and update cadence (weekly vs every 5 months). On price 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. ColorMetric sells 1 in-app purchase, starting at $9.99 per year. CompareImage asks for nothing beyond the download.
CompareImage ships an update every 5 months, ColorMetric weekly. The most recent releases landed on August 26, 2026 and September 9, 2026 respectively.
| Parameter | CompareImage | ColorMetric |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 months | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | gangadhar goud | Lance Zukel |
In-app purchases
CompareImage
No in-app purchases
ColorMetric
- ColorMetric Annual Ad Free$9.991 Year
