Comparison

Sincerely vs OneDay

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

Head to head
About

Sincerely

Never forget important dates or personal details again. This app helps you track custom occasions, remember likes and dislikes, and manage gift ideas for everyone you know. Stay organized with home screen widgets and timely notifications.

Highlights
  • Custom occasion reminders
  • Contact profile tracking
  • Gift idea organizer
  • Home screen widgets
  • Time-sensitive notifications
  • Searchable occasion lists
Features
Read full description

In a world overflowing with events, moments, and milk cartons with expired dates, wouldn’t it be nice to be able to remember it all? What if you had a friend that new all the big and small occasions, to give you a little reminder? Here's how it works: - Remember occasions for anything From holidays to the day you adopted your pet turtle, Leonard. Our custom occasions feature ensures you can remember every event that is important to you. - Track likes & dislikes With detailed contact profiles, you'll remember Aunt Linda's newfound love for salsa dancing or Kelly’s latest kitchen disaster. - Easily sort & search all occasions Customized lists for any occasions you want, half-birthdays, holidays, first day of school, anything you want. - Gift ideas tracker Give better gifts by writing down the small wants you hear about from someone throughout the year, making that time of year stress-free. - Home screen widgets See upcoming occasions front and center. - Time-sensitive notifications When occasions get close we will send you notifications so you have plenty of time to prepare. Forgot Grandma’s birthday again? We didn’t. And hey, we're here to ensure you remember next time. Can’t remember if it’s your third or fourth anniversary? No worries, your friends here at sincerely-est know, we won’t tell if you don’t...

About

OneDay

Features
Read full description

Create countdowns for birthdays, anniversaries, and all your important days with OneDay. Use countdown, reminders, and widgets in one app. Smart notifications help you stay on time, while home and lock screen widgets show days left at a glance. Start free, then unlock unlimited events with a one-time purchase. KEY FEATURES • PAST AND FUTURE TABS See how many days until upcoming events in the Future tab, and how many days ago past events occurred in the Past tab. • SMART NOTIFICATIONS Get reminders 30 days, 7 days, 1 day before, and on the event day at your chosen time. Set your notification time and never miss an important moment! • YEARLY REPETITION Perfect for birthdays, wedding anniversaries, and all recurring special occasions! With "repeat yearly" option, see both how many years have passed and days until the next occurrence. Example: "Our Wedding Anniversary, 10th year, 45 days to go" • PERSONALIZATION - Choose from 12 colors - Add one of 24 tags (birthday, anniversary, vacation, etc.) - Add photos from your gallery to make events more meaningful • WIDGET SUPPORT View your events instantly on home screen and lock screen. Get information without opening the app. • PIN AND FILTER Keep important events at the top of your list. Quickly filter by color, tag, or pinned status. • SHARING Share your events as colorful cards in messaging apps, social media, or anywhere you want. • FULL EDITING Easily edit, delete, or modify all events. ACCESSIBILITY I developed OneDay entirely with VoiceOver. As a blind developer, I ensured every feature works perfectly with screen readers. All buttons, fields, and content are optimized for VoiceOver. MULTILINGUAL Available in 14 languages: Turkish, English, German, French, Spanish, Italian, Russian, Arabic, Japanese, Korean, Chinese, Hindi, Indonesian, Portuguese PRIVACY All your data stays safe on your device. Optional iCloud sync to synchronize across your devices. No ads, no tracking, your data belongs only to you. UNLOCK UNLIMITED The free version allows 5 events. For more, unlock unlimited events with "Go Premium" feature. One-time payment, not a subscription! Support independent development with this lifetime purchase. --- Developer: Recep Gür Contact: seslerinizindeapps@outlook.com My wife Ayşe and I, as a blind couple, share our experiences on social media and create awareness content. We developed OneDay with care for you. Hope it helps!

Screenshots

Sincerely4 screens
OneDay4 screens

Verdict

The call

The clearest difference is in-app purchases: Sincerely at none against OneDay's 1. Sincerely also leads on update cadence (every 4 months vs every 8 months). On price, ads, device support and iOS requirement 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. OneDay sells 1 one-off in-app purchase. Sincerely asks for nothing beyond the download.

UpkeepUpdate frequency

Sincerely ships an update every 4 months, OneDay every 8 months. The most recent releases landed on October 1, 2026 and October 21, 2026 respectively.

Scorecard2 real differences · 8 level
Sincerely versus OneDay: the parameters behind the verdict, then further details
ParameterSincerelyOneDay
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 months — betterEvery 8 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size59 MB4 MB
Age rating12+4+
DeveloperVilidea LLCRECEP GUR

In-app purchases

None

Sincerely

No in-app purchases

1 purchases

OneDay

One-time1
  • Premium$7.99

Questions

Is Sincerely free?
Sincerely is free to download, with no in-app purchases.
Is OneDay free?
OneDay is free to download, with in-app purchases available.
Do Sincerely or OneDay have ads?
Neither Sincerely nor OneDay shows ads.
Which is updated more often, Sincerely or OneDay?
Sincerely ships an update every 4 months, and OneDay every 8 months. Most recently, Sincerely was updated on October 1, 2026 and OneDay on October 21, 2026.

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