Dayno vs ByWhen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dayno
Easily track important upcoming dates with a clean, readable countdown. Perfect for events like trips, exams, or anniversaries, this app helps you stay organized and makes big days feel closer. Add unlimited events and prioritize what matters most with its minimal design.
- Quick event creation
- Clear, at-a-glance countdowns
- "Today" highlight
- Track multiple events
- Minimalist design
- Event prioritization
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Dayno is a simple, satisfying way to track the moments that matter. Dayno makes counting down to the moments that matter simple and satisfying. Create an event and get a clean, readable countdown that keeps big days feeling close. When the date arrives, Dayno lets you know it’s here—perfect for launches, exams, anniversaries, and long-awaited trips. Features: - Quick add: name it, pick a date—done. - Clear, at-a-glance countdowns. - “Today” highlight for the big day. - Track multiple events side by side (birthdays, trips, deadlines, more). - Calm, minimal design that’s easy to read. - Mark a countdown as important (star/priority) so the big ones stand out and stay at the top. Add unlimited countdowns—vacations, birthdays, weddings, anniversaries, graduations, new jobs, first day of school, exams, product launches, conferences, concerts, festivals, movie premieres, sports games, race day/marathons, road trips, weekend getaways, moving day, home closings, lease renewals, flights, baby due dates, adoption days, pet adoptions, reunions, date nights, and more.
ByWhen
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A deadline is not just a date. It is a promise your future self needs help keeping. ByWhen helps you turn important tasks into practical reminder plans. Instead of relying on one alert, ByWhen looks at what needs to be done, when it is due, how long it may take, what kind of attention it needs, and when your day has realistic space for it. Add a task, set the due date, estimate the effort, choose the task type, and ByWhen helps you stay aware of the work before it turns into last-minute pressure. ByWhen is built for: - Work projects with real due dates - Assignments, exams, and study sessions - Calls, forms, paperwork, and admin tasks - Errands that need time away from home or work - Personal tasks that are easy to postpone - Daily, weekly, monthly, yearly, and selected-day routines DEADLINE PLANS ByWhen helps you think beyond a simple due date. It considers time remaining, estimated effort, task priority, task type, and available windows in your day. A short call can fit differently than a focused work session. An errand that requires leaving home can be treated differently from a quick task you can do during a break. REMINDERS WITH CONTEXT ByWhen keeps the deadline visible as time passes. It highlights whether a task is on track, needs attention, is at risk, or has become critical. If you do not act on a reminder right away, the task remains part of your plan so you can return to it later. OPEN-TIME PLANNING With your permission, ByWhen can use calendar busy blocks to avoid suggesting times that are already occupied. You can choose what to include, ignore imported blocks, and keep control of your schedule. ROUTINE SETTINGS Set your wake time, sleep time, work hours, and workdays so reminder timing fits your real life. ByWhen can avoid unhelpful times and protect parts of the day when reminders would not make sense. TASK TYPES Different tasks need different kinds of time. ByWhen supports task types such as focused work, admin, calls, study, errands, and away-from-home tasks. This helps ByWhen suggest more realistic moments instead of treating every reminder the same way. REPEATING TASKS Create repeating tasks for daily, weekly, monthly, yearly, or selected days of the week. When you complete a repeating task, ByWhen moves the next cycle forward so you are not reminded again for the period you already finished. QUICK ACTIONS Act from a reminder when possible. Start work, be reminded later, log time, or mark the task done so your plan can stay up to date. PRIVATE BY DESIGN ByWhen is built with privacy in mind. Your tasks, schedule blocks, routine settings, and reminder plans stay on your device. No account is required to start. If you choose to export a backup, it goes to your own selected destination. BYWHEN PREMIUM Your first 7 days are ByWhen Premium. During this time, all smart planning features are available. ByWhen Premium keeps every reminder active and unlocks the full planning experience, including unlimited active reminders, deadline plans, open-time planning, task-specific reminder styles, repeating tasks, quick actions, and routine personalization. After the first 7 days, your reminders stay safe, but Premium is required to keep all smart reminders active. Download ByWhen and give your deadlines a plan you can trust. Privacy Policy: https://nionlite.com/bywhen-privacy.html Terms of Use: https://nionlite.com/bywhen-terms.html
Screenshots
Verdict
The clearest difference is update cadence: ByWhen at every 5 days against Dayno's fortnightly. Dayno's advantage is iOS requirement (15.1 vs 17.0). 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. Dayno sells 8 in-app purchases, starting at $5.99 per 7 days and ByWhen sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Dayno ships an update fortnightly, ByWhen every 5 days. The most recent releases landed on October 16, 2026 and October 22, 2026 respectively.
| Parameter | Dayno | ByWhen |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 72 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Rectangula Inc. | NiONlite LLC |
In-app purchases
Dayno
- Pro$5.997 Days
- Pro$7.997 Days
- Pro2 variants$9.991 Month
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- Pro2 variants$11.991 Month
- Pro$14.991 Month
- Pro$19.991 Month
- Pro3 Days trial$29.991 Year
- Pro1 Month trial$79.991 Year
ByWhen
- Monthly Premium$4.991 Month
- Annual Premium$39.991 Year
- Lifetime Premium$79.99









