calera vs ROXFIT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
calera
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Calera is the first solution to monitor core body temperature continuously and non-invasively. Using the same technology as CORE but being specifically designed for researchers, calera will allow real-time core body temperature monitoring and high-resolution (1 Hz) data downloading. Individually calibrated devices will make sure your measurements are of the highest accuracy. IMPORTANT: The calera app is designed to work with the calera device, which can be ordered at https://corebodytemp.com/products/core-calera-research. This app is not designed for use with the CORE sensor. 1. What does calera do? calera helps you track the core body temperature. This is the interior temperature of the body – including organs and other tissues – which can substantially differ from the skin temperature. Core temperature changes due to physiological processes such as illness, intense activity, circadian cycles, or ovulation. calera will allow you to continuously and non-invasively track this internal temperature with high accuracy during your research experiments. 2. Get access to your data at any time calera stores your data locally on the device and connects to the app to display it. If you use the app to display the temperature, the data is also pushed to a secure cloud solution, where you can view it and download it for further analysis. calera additionally comes with two unique features: the computer based Research tool and high time resolution logging mode. For more information about data storage and accessibility, please check the calera manual. 3. Why is calera different from other solutions? Before calera, only invasive methods such as rectal probes or ingestible e-pills were available for measuring the core body temperature. For the first time, calera provides an accurate, continuous, non-invasive solution for monitoring core body temperature, regardless of the activity and environment. As proof of its unique value, the consumer version of calera, CORE, is already used by UCI World Teams and top triathletes worldwide. The full list of well-known athletes, trainers and other users is available at: www.corebodytemp.com. 4. How does it work? The calera device clips onto your heart-rate monitor belt or sports bra. It can also be worn using specially designed medical-grade patches. For best results, wear calera on the same side as your smartwatch. calera supports ANT+ and works with most Garmin Connect IQ and Wahoo devices. More info: Website: https://corebodytemp.com/pages/research Privacy Policy: https://www.greenteg.com/privacy Terms and conditions: https://www.greenteg.com/terms
ROXFIT
This app is a comprehensive training platform for hybrid athletes, offering AI-powered workout creation, community features, and advanced tools for race preparation and performance tracking. It supports Hyrox, CrossFit, marathons, and obstacle course racing.
- AI-powered workout generation
- Custom workout builder
- Training planner
- Race analytics and performance tracking
- Community features
- Workout player with real-time guidance
- Unified search
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The app for Hyrox and Hybrid Fitness Racing RoxFit is the ultimate training platform for hybrid athletes. Whether you're preparing for your first Hyrox race, chasing a podium finish, or training for CrossFit, marathons, and obstacle course racing, RoxFit gives you the tools to train smarter and perform better. HYPE - YOUR HYBRID PERFORMANCE ENGINE Meet HYPE, your AI training partner. Simply describe the workout you want, and HYPE creates it instantly. "Give me a 30-minute Hyrox-focused conditioning workout" or "Build me a strength session for sled power" - HYPE understands and delivers. Create AI-powered workouts through natural conversation. Get intelligent exercise suggestions based on your goals. Receive smart modifications for your fitness level and available equipment. CONNECT WITH THE COMMUNITY Train alongside thousands of hybrid athletes worldwide. Discover workouts from top Hyrox and CrossFit athletes. Follow friends and training partners to stay motivated. Share your race results and achievements. ADVANCED TRAINING TOOLS WORKOUT BUILDER Design custom workouts with our intuitive builder. Choose from thousands of exercises or create your own. Structure complex training sessions with multiple blocks, rounds, and intervals. TRAINING PLANNER Plan your week with ease. Schedule workouts, track completion, and maintain training consistency. Visualize your training load across running, strength, and conditioning. WORKOUT PLAYER Your personal training coach during every session. Real-time guidance through each exercise, set, and rest period. Voice cues and visual timers keep you focused. Seamless integration with heart rate monitors and fitness devices. RACE ANALYTICS & PERFORMANCE Built specifically for Hyrox and hybrid fitness racing. Comprehensive race result tracking and analysis. Detailed station-by-station breakdowns for Hyrox races. Performance comparisons across races and seasons. Beautiful visualizations of your progress. Easy sharing of race achievements. Division rankings and leaderboards. UNIFIED SEARCH Find anything instantly. One search bar for workouts, exercises, events, and athletes. Discover new training ideas, locate specific exercises, find upcoming races, and connect with other athletes. INTEGRATIONS & SYNC Seamlessly connect with your fitness ecosystem. Garmin Connect for automatic workout import. Strava for activity sync and social features. Health Connect for unified health data. Heart rate monitors for real-time training zones. TRACKING & INSIGHTS Multi-modal streak tracking for strength, running, and conditioning. Detailed workout history and analytics. Personal record detection. Training volume and intensity analysis. Heart rate zone analysis. Progress tracking over time. VERSATILE TRAINING RoxFit adapts to your training style and goals. Hyrox-specific workouts and race preparation. CrossFit WODs and functional fitness. Running programs from 5K to marathon. Strength training and powerlifting. HIIT and metabolic conditioning. Mobility and recovery sessions. WHY ATHLETES CHOOSE ROXFIT Purpose-built for hybrid athletes and Hyrox racing. AI-powered workout creation saves time and provides variety. Active community of thousands of athletes. Comprehensive race analytics unavailable anywhere else. Beautiful, intuitive interface that's fast and reliable. GET STARTED TODAY Join thousands of hybrid athletes training smarter with RoxFit. Whether you're training for your first race or competing at the elite level, RoxFit helps you reach your potential. Download now and experience the future of hybrid fitness training. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: calera at none against ROXFIT's 5. ROXFIT's advantage is update cadence (every 4 days vs every 4 months) and chart position (#152 vs unranked). On price, ads, device support and iOS requirement 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. ROXFIT sells 5 in-app purchases, starting at $15.99 per month. calera asks for nothing beyond the download.
calera ships an update every 4 months, ROXFIT every 4 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | calera | ROXFIT |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (4.5K ratings) — better |
| Positive reviews | — | 82.8% of reviews |
| Number of ratings | — | 4.5K — better |
| Update frequency | Every 4 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Best chart rank | — | #152 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 184 MB |
| Age rating | 4+ | 4+ |
| Developer | greenteg AG | ROXFIT Limited |
In-app purchases
calera
No in-app purchases
ROXFIT
- Ultra Monthly$15.991 Month
- Ultra Annual$79.991 Year
- Ultra Annual14 Days trial$79.991 Year
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- Ultra Annual1 Month trial$79.991 Year
- Ultra Annual7 Days trial$79.991 Year









