Argon18 vs Circa
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Argon18
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CONNECT Scan and connect to your compatible AUX bike to receive data from your bike and control additional features. CONTROL Customize your AUX bike lighting system to provide a more personalized lighting setup. You can choose the light pattern and intensity for the front light and/or rear light independently. UPDATE Update your AUX bike to the latest firmware to unlock the full potential of your bike and enjoy additional features.
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.
- Personalized daily routines
- Digital distraction blocking
- Private sleep insights
- Circadian schedule visualization
- Product discovery for sleep
- Apple Health integration
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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
Screenshots
Verdict
The clearest difference is iOS requirement: Argon18 at 13 against Circa's 18.0. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Argon18 | Circa |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13 — better | 18.0 |
| Further details — not scored | ||
| Size | 87 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Argon 18 | jean-baptiste delcros |
In-app purchases
Argon18
No in-app purchases
Circa
No in-app purchases
