Comparison

Circa vs C

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Circa

Build a calmer bedtime routine and understand your sleep patterns with private insights from Apple Health. Plan daily habits, reduce digital distractions before bed, and track sleep trends securely on your device.

Highlights
  • Personalized daily routines
  • Digital distraction blocking
  • Private sleep insights
  • Circadian schedule visualization
  • Product discovery for sleep
  • Apple Health integration
Features
Read full description

Build a calmer bedtime routine and understand the patterns behind your sleep. Circa combines a practical circadian schedule with private sleep insights from Apple Health. Plan the habits that shape your day, reduce digital distractions before bed, and follow your sleep trends without sending sensitive health data to external servers. YOUR DAILY RHYTHM • Create a personalized wake-up, morning light, meal, wind-down, and bedtime routine • See your current phase and what comes next at a glance • Receive optional reminders and Live Activities at the right time PROTECT YOUR WIND-DOWN • Choose distracting apps, categories, or websites with Screen Time • Apply optional boundaries during wind-down and after waking • Keep your selections private through Apple’s Family Controls framework PRIVATE SLEEP INSIGHTS • Turn sleep records stored in Apple Health into clear duration and bedtime trends • Follow resting heart-rate patterns from a compatible wearable • Explore interactive weekly and monthly charts CALMER DISCOVERY • Browse a focused collection of products for darkness, noise, comfort, and waking • Open product pages securely in an in-app Safari view • Affiliate links are clearly disclosed and never affect your price PRIVACY BY DESIGN Your Apple Health values and Screen Time selections are processed on your device. They are never sent to Mixpanel, Amazon, or advertising platforms. Circa uses limited analytics only when a Discover product link is opened. Circa is a general wellbeing tool and is not a medical device. It does not diagnose, treat, cure, or prevent any condition. Privacy Policy URL: https://studiojb.app/privacy/circa Terms of Use URL: https://studiojb.app/terms/circa

About

C

This app verifies gym check-ins with GPS to track real progress and build streaks. It allows users to log workouts, compete on leaderboards, and connect with friends and local gym communities. Premium features offer advanced analytics and customization.

Highlights
  • GPS-verified gym check-ins
  • Workout logging (exercises, sets, reps, weight)
  • Streaks and XP for gym attendance
  • Monthly gym leaderboards
  • Social features: follow friends, group challenges
  • Muscle group identification
  • Rest timer with Lock Screen Live Activities
Features
Read full description

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 gym’s 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 friends’ 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-Rex’s core features — including gym check-ins, workout logging, streaks, XP, social features, challenges and chat — 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

Screenshots

Circa4 screens
C4 screens

Verdict

The call

The clearest difference is in-app purchases: Circa at none against C's 2. C's advantage is update cadence (every 5 days vs every 3 weeks) and iOS requirement (16.0 vs 18.0). On price, rating, review sentiment and ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. C sells 2 in-app purchases, starting at $4.99 per month. Circa asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Circa against 5.0 for C. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Circa ships an update every 3 weeks, C every 5 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Circa versus C: the parameters behind the verdict, then further details
ParameterCircaC
PriceFreeFree
Rating5.0 (2 ratings)5.0 (5 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings25 — better
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone
Requires iOS18.016.0 — better
Further details — not scored
Size11 MB125 MB
Age rating4+12+
Developerjean-baptiste delcrosJerry Kwong

Customer experience

Circa

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

C

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Circa

No in-app purchases

2 purchases

C

Subscriptions2
  • C-Rex Monthly Subscription$4.991 Month
  • C-Rex Yearly Subscription$49.991 Year

Questions

Is Circa free?
Circa is free to download, with no in-app purchases.
Is C free?
C is free to download, with in-app purchases available.
Which has better reviews, Circa or C?
Circa and C are both rated 5.0 out of 5 on the App Store, from 2 and 5 ratings respectively.
Do Circa or C have ads?
Neither Circa nor C shows ads.
Which is updated more often, Circa or C?
Circa ships an update every 3 weeks, and C every 5 days. Most recently, Circa was updated on November 5, 2026 and C on October 31, 2026.

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