C vs Dosion
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
C
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Most fitness apps take your word for it. C-Rex does not. C-Rex is a GPS-verified gym and workout tracker that turns showing up into real progress. Every check-in is tied to the gym you are actually visiting. Build streaks, earn XP, compete on monthly gym leaderboards and train with people around you. SHOW UP AND MAKE IT COUNT Check in when you arrive at the gym. C-Rex uses GPS to verify that you are actually there. Build a streak based on real gym sessions, not good intentions. Earn XP and climb your gymβs monthly leaderboard. Join challenges and earn rewards when you complete them. TRAIN WITH YOUR PEOPLE Follow friends and see who is training right now. View your friendsβ workout activity in one feed. Create or join groups with your training partners. Take on group challenges together. Message the people you train with without leaving the app. LOG EVERY WORKOUT Track exercises, sets, reps, weight, duration and cardio. Choose from a database of 500+ exercises. See a weekly muscle map showing what you have trained. Identify the muscle groups you keep neglecting. Select the muscles you want to work and build a session around them. Use the rest timer while you train. Keep your timer visible on your Lock Screen with Live Activities. FIND YOUR GYM COMMUNITY Discover gyms near you on the map. See who is training at nearby gyms. Find gym buddies who match your training lifestyle. Share workouts, progress and achievements with the community. C-REX PREMIUM Upgrade to Premium for: Progress charts over time Private progress comparisons with friends The ability to see who viewed your profile Custom name colours and emojis GIFs in group chats Streak Shield protection C-Rexβs core features β including gym check-ins, workout logging, streaks, XP, social features, challenges and chat β are available for free. Premium is available as a monthly or yearly subscription. Subscriptions automatically renew unless cancelled at least 24 hours before the current billing period ends. Payment is charged to your Apple Account upon confirmation of purchase. You can manage or cancel your subscription through your Apple Account settings after purchase. Privacy Policy: https://gym-app-ce4a9.web.app/privacy Terms of Service: https://gym-app-ce4a9.web.app/terms
Dosion
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Keep track of your vitamins and supplements: whatβs due, what youβve taken, and what comes next. Dosion brings your daily schedule, reminders, and intake history together on your iPhone. YOUR ROUTINE, CLEARLY ORGANIZED β’ See upcoming, taken, skipped, and missed doses at a glance. β’ Set intake times, reminders, cycles, and planned breaks. β’ Log the actual time of a late dose or record why you skipped it. β’ Add a supplement just for today without creating a recurring schedule. ADD YOUR SUPPLEMENTS YOUR WAY Scan a barcode or photograph a label, search the library, or enter details yourself. Keep your supplement list, serving amounts, and timing in one place. Review scanned details before saving. SEE YOUR NUTRIENT TOTALS For supported nutrients, compare intake with published reference values and view upper-limit checks when editing your routine. References include NIH ODS, EFSA, and NASEM. Coverage depends on available ingredient data; these checks do not assess every supplement or interaction. NOTICE PATTERNS OVER TIME Record how you feel with quick check-ins for mood, energy, focus, stress, and symptoms. Explore possible associations between your supplement routine and, with Pro, optional Apple Health data. Patterns need enough logged data and show associations, not proof of cause and effect. BUILT AROUND YOUR PRIVACY Core tracking works offline. Start in Guest mode without creating an account. Pattern analysis runs on your device, and Apple Health data is not sent to Dosion servers. Optional iCloud sync uses your Apple account to sync your routine, logs, check-ins, and profile. Export or delete your data from Settings. START FREE. EXPAND WITH PRO. Free includes up to 5 active supplements, 3 reminders per day, and 14 days of history. It also includes a limited Personal Library, Patterns, food searches, and stack sharing. Dosion Pro adds a larger supplement list, full history, deeper nutrient views and Patterns, inventory and spending tracking, home-screen widgets, and unlimited reminders. It also enables optional logging of supported nutrients to Apple Health. Monthly and annual subscriptions are available. Add your first supplement and make todayβs routine easier to follow. Dosion is for wellness tracking and education. It does not provide medical advice, diagnosis, or treatment. Ask a qualified healthcare professional about your supplements and health. Privacy Policy: https://dosion.bioaionics.com/privacy Terms of Use: https://dosion.bioaionics.com/terms
Screenshots
Verdict
The clearest difference is update cadence: C at every 4 days against Dosion's every 9 days. C also leads on iOS requirement (16.0 vs 18.0). On price, review sentiment, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. C sells 2 in-app purchases, starting at $4.99 per month and Dosion sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
C ships an update every 4 days, Dosion every 9 days. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.
| Parameter | C | Dosion |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Every 4 days β better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 16.0 β better | 18.0 |
| Further details β not scored | ||
| Size | 125 MB | 30 MB |
| Age rating | 12+ | 17+ |
| Developer | Jerry Kwong | Artem Odintsov |
Customer experience
C
Dosion
In-app purchases
C
- C-Rex Monthly Subscription$4.991 Month
- C-Rex Yearly Subscription$49.991 Year
Dosion
- Dosion Pro Monthly$4.991 Month
- Dosion Pro Annual7 Days trial$39.991 Year








