DaysyDay Partner vs ChainFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DaysyDay Partner
This application allows users to view a partner's fertility data from another app. It displays past, present, and predicted fertility statuses, along with temperature curves and shared cycle details like menstruation and ovulation.
- View partner's fertility data
- Calendar view of fertility status
- Temperature curve overview
- Share menstruation and ovulation data
- Add personal notes
- Comprehensive cycle understanding
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DaysyDay Partner is the perfect complement to the DaysyDay App, allowing you to easily view your friend or partner’s Daysy data. The calendar view allows you to see past, present, and predicted fertility statuses while the temperature curve shows an overview of the cycle. Daysy users can also choose to share additional cycle data such as menstruations, ovulations, cervical fluid, intercourse, and personal notes to provide a comprehensive understanding of the cycle and keep you in the know.
ChainFlow
Create highly customized interval timers for any routine, from HIIT workouts to study sessions. Set unique work and rest periods for each segment, with clear audio cues and a distraction-free interface. Save your routines for easy access and hands-free operation.
- Custom interval chaining
- Adjustable work/rest times per interval
- Clear audio cues
- Hands-free operation
- Screen-off functionality
- Routine saving
- Dark interface
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A custom interval timer for routines where every interval can be different. Most workout timers are built around repeating the same work and rest periods. ChainFlow lets you build the exact sequence you need, with individual timing for every step. Create HIIT workouts, circuit training sessions, stretching and mobility routines, boxing rounds, exercise sequences, drawing practice, focus sessions, and more. BUILD ANY ROUTINE Add as many intervals as you need. Give each one its own name and timing, then drag them into the exact order you want. START FAST WITH TEMPLATES Begin with ready-made HIIT, Tabata, Boxing, Morning Mobility, Pomodoro, and Gesture Drawing templates—or start completely from scratch. Every template becomes a normal ChainFlow routine you can fully edit. HANDS-FREE TIMING Hit Start and focus on what you're doing instead of watching the clock. ChainFlow automatically moves through your sequence and gives you clear audio cues at each transition. • Works while your phone is locked or ChainFlow is in the background • Live Activities and Dynamic Island support • See your current interval and what comes next • Pause, skip forward, or return to the previous interval • Optional 3-2-1 countdown before starting • Works alongside music, podcasts, and other audio • Optional audio ducking during cues BUILD ONCE. USE IT AGAIN. Save your favorite routines, duplicate individual intervals or entire chains, reorder them anytime, and quickly adjust a routine for your next session. ChainFlow works especially well when your routine doesn't fit a rigid repeating timer: • Custom interval workouts • Circuit training • HIIT and Tabata • Stretching and mobility • Boxing and round training • Exercise and strength training • Yoga and meditation sequences • Gesture and figure drawing practice • Pomodoro and focus sessions Whether you're training, stretching, drawing, studying, or building a routine of your own, ChainFlow keeps the timing out of your head so you can stay in the flow.
Screenshots
Verdict
The clearest difference is rating: ChainFlow at 5.0 against DaysyDay Partner's 4.0. DaysyDay Partner's advantage is in-app purchases (none vs 1) and ratings volume (8 vs 1). On price, update cadence, ads 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. ChainFlow sells 1 one-off in-app purchase. DaysyDay Partner asks for nothing beyond the download.
ChainFlow holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: DaysyDay Partner has 8 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 2, 2026 and September 3, 2026 respectively.
| Parameter | DaysyDay Partner | ChainFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (8 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 56 MB | 22 MB |
| Age rating | 17+ | 4+ |
| Developer | Valley Electronics | Michael Ebako-Hodgson |
Customer experience
DaysyDay Partner
ChainFlow
In-app purchases
DaysyDay Partner
No in-app purchases
ChainFlow
- ChainFlow Pro$4.99
Questions
Is DaysyDay Partner free?
Is ChainFlow free?
Which has better reviews, DaysyDay Partner or ChainFlow?
Do DaysyDay Partner or ChainFlow have ads?
Which is updated more often, DaysyDay Partner or ChainFlow?
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