Time Tracker by ARS vs OIO Circadian
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Tracker by ARS
This app assists physicians and APPs in meticulously tracking and documenting their work hours for RVU calculations. It offers offline time entry with secure server synchronization for data storage. Contact Advanced Radiology Services PC to begin using this tool.
- Time tracking for RVU purposes
- Offline time entry
- Secure server synchronization
- Data documentation
- Physician and APP focused
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Helps physicians and APPs track and document their time for RVU purposes. Supports offline time entry and synchronization to the server, in order to upload your data and store it securely. Contact Advanced Radiology Services PC to get started.
OIO Circadian
This app visualizes your light exposure throughout the day, offering personalized schedules to improve sleep and energy. Control smart lighting scenes and individual rooms for whole-home wellness lighting.
- Spectral Display for light wavelengths
- Personalized circadian lighting schedules
- Instant smart lighting scene control
- Individual room lighting adjustment
- Whole-home lighting management
- Easy bulb setup and room grouping
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LIGHT THAT FOLLOWS YOUR BODY'S CLOCK OIO lights change through the day on their own, following your body's natural rhythm. Tell the app when you wake up and go to sleep, and OIO builds a circadian lighting schedule to help you fall asleep faster, wake up more refreshed, and maintain energy throughout the day. BLUE, ENERGIZING LIGHT BY DAY Daytime light is enriched with blue, the way sunlight is, to strengthen your internal clock and keep you alert and focused. ZERO BLUE TO PRODUCE BIOLOGICAL NIGHTTIME In the evening, OIO removes the blue light entirely. Your lights stay warm and bright enough to live by, while your body gets the signal that it's time to wind down. A DEEP RED LIGHT FOR WHEN YOU'RE UP AT NIGHT At night, a gentle, deep-red light lets you find your way without switching on bright, blue-rich light. SEE THE BLUE LIGHT YOUR EYES CAN'T Your eyes can't tell blue-free light from ordinary warm light, but your body can. The OIO Loop, included in every box, shows you the difference, and the Learn tab charts the spectrum of light you receive in each phase. It's a visual guide to the type of light spectrum that supports your health. SET YOUR DAY, EVENING AND NIGHT Choose when each phase begins and how gradually the light changes, for the whole home or room by room. OIO can turn the lights on for you when a phase begins. EVERY LIGHT IN A ROOM, IN ONE PLACE Adjust a whole room at once, or fine-tune brightness and color light by light. Create scenes for the moments you repeat, like wake up, focus, movie night or bedtime, and run them with a tap or on a schedule with a gentle ease-in. MADE FOR EVERY ROOM IN THE HOUSE See and control every room from one screen. Invite the people you live with, and add your OIO lights to the smart-home app you already use. Setup takes a few taps: the app finds a new light nearby, or scan the code on the light. No hub required. TRY IT FIRST Not set up yet? Open Demo Mode from the sign-in screen and explore a sample home, no account or lights needed. OIO lights are required to control lighting.
Screenshots
Verdict
The clearest difference is rating: Time Tracker by ARS at 5.0 against OIO Circadian's 2.5. Time Tracker by ARS also leads on device support (3 vs 1) and iOS requirement (10.1 vs 17.0). On price, ratings volume, update cadence and ads 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.
Time Tracker by ARS holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 5 and 6 respectively.
Time Tracker by ARS ships an update every 3 weeks, OIO Circadian every 6 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | Time Tracker by ARS | OIO Circadian |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 2.5 (6 ratings) |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | 5 | 6 — better |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 10.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 51 MB | 105 MB |
| Age rating | 4+ | 12+ |
| Developer | Advanced Radiology Services, PC | KORRUS, INC |
Customer experience
Time Tracker by ARS
OIO Circadian
In-app purchases
Time Tracker by ARS
No in-app purchases
OIO Circadian
No in-app purchases
Questions
Is Time Tracker by ARS free?
Is OIO Circadian free?
Which has better reviews, Time Tracker by ARS or OIO Circadian?
Do Time Tracker by ARS or OIO Circadian have ads?
Which is updated more often, Time Tracker by ARS or OIO Circadian?
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