CobbMeter CE vs Whatzit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CobbMeter CE
This medical tool transforms your iPhone into a professional measuring device for spinal radiographs. It accurately calculates Cobb angle, kyphosis angle, and sacral slope, aiding spinal care professionals in diagnosis and treatment planning.
- Measures Cobb angle
- Measures kyphosis angle
- Measures sacral slope
- Uses iPhone position sensor for accuracy
- Logs and emails measurements
- Calibration for horizontal plane measurements
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CobbMeter is a medical tool designed to measure the Cobb angle, the kyphosis angle, and the sacral slope on vertical spine radiographs. It is intended to the Spinal care professional, and turns the iPhone into a professional measuring tool. " I designed CobbMeter with Regis Rigal as the professional tool I had always needed in my everyday practice in both Orthopedic Spine Surgery and Spinal non operative care. A tool that fits in the pocket in the very same device that I use to manage my busy schedule, that I can call immediately by pressing an icon, and which can be used on both regular radiographs or even a (vertical) computer screen to measure accurately the Cobb angle in spinal deformities, but also the kyphosis angle in spinal fractures and the sacral slope in degenerative and deformitic conditions. All that one has to do in using the device is align the side of the iPhone to the standard tracings we use routinely, and the position sensor built in the iPhone will do the rest. The precision of the device itself is 1/10th of a degree, far more precise than the precision of the measure as determined in everyday practice and the literature. Measures are logged for further use and may be sent by e-mail to the surgeon or staff for recording purposes, with the levels of the measured curve, type of curve and patient id or number. A calibration procedure was also implemented to accurately measure the angle with the horizontal plane as in the sacral slope. Through though the developpement, Regis has shown an extraordinary sense of patience and astounding programming skills so as to accurately provide a tool that fits the needs of the surgeon and the spine care provider to best treat the patients ; and I thank him for his efforts. I am very proud of releasing this small software in the community, and I hope it will facilitate a little bit the life of my dear colleagues and the patients. I thank the colleagues who gave me their kind advice on the software during its developpement and wish they will find it useful." Dr Frederic Jacquot Chirurgien du Rachis Chirurgien Orthopédiste, Chirurgien des Hôpitaux de Paris
Whatzit
This secure platform aids in spine implant identification by allowing users to post X-rays for crowdsourced feedback. It utilizes proprietary AI-powered redaction technology to automatically remove sensitive text from images directly on your device before sharing.
- Spine implant identification
- Crowdsourced X-ray feedback
- AI-powered auto-redaction
- On-device data processing
- Secure image sharing
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Whatzit is a secure platform tailor-made for spine implant identification. Featuring the proprietary TextScrub auto-redaction technology, Whatzit is the ONLY secure way to post X-rays for crowdsourced feedback. What is TextScrub? Exclusive to Whatzit, TextScrub technology uses AI, computer vision and other proprietary processes to automatically redact text from X-rays prior to being posted in the Whatzit app. This lightning fast process takes place completely on your device without any communication with Whatzit's cloud-based servers. Un-redacted X-rays with potentially sensitive information should never leave your device. Please keep in mind as you use the Whatzit app that modern mobile applications are incredibly difficult to build and just as difficult to maintain. Let us know if you notice anything that seems off or if you find a bug. We'll do our best to find a remedy in a timely manner. Additional improvements and exciting new features are on the way. Be sure to check back often for updates.
Screenshots
Verdict
The clearest difference is review sentiment: Whatzit at 82% against CobbMeter CE's 25%. Whatzit also leads on price (Free vs $8.99) and rating (4.7 vs 1.8). CobbMeter CE's advantage is in-app purchases (none vs 5) and update cadence (every 2 weeks vs every 6 weeks). On 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
Whatzit is free to download; CobbMeter CE costs $8.99 up front. Whatzit sells 3 in-app purchases, starting at $29.99 per month. CobbMeter CE asks for nothing beyond the download.
Whatzit holds the better App Store score, 4.7 against 1.8. That said, the two scores are not equally well evidenced: Whatzit has 38 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 25% of CobbMeter CE's written reviews are positive against 82% of Whatzit's.
CobbMeter CE ships an update every 2 weeks, Whatzit every 6 weeks. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.
| Parameter | CobbMeter CE | Whatzit |
|---|---|---|
| Price | $8.99 | Free — better |
| Rating | 1.8 (5 ratings) | 4.7 (38 ratings) — better |
| Positive reviews | 25.0% of reviews | 81.8% of reviews — better |
| Number of ratings | 5 | 38 — better |
| Update frequency | Every 2 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | — | #127 — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 6.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 4 MB | 33 MB |
| Age rating | 12+ | 17+ |
| Developer | Regis RIGAL | Essential Ventures LLC |
Customer experience
CobbMeter CE
Whatzit
In-app purchases
CobbMeter CE
No in-app purchases
Whatzit
- Upgrade to Premium2 variants$29.991 Month
- Upgrade to Premium2 variants$179.991 Year
- Boost Your Post$14.99









