Comparison

Coves vs 数日

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

Head to head
About

Coves

This app helps students prepare for exams by breaking down large goals into manageable tasks, scheduling study sessions, and tracking focused study time. It provides visual feedback on progress, allowing users to see which subjects need more attention and stay motivated with focus timers and white noise.

Highlights
  • Break down large goals into tasks
  • Schedule tasks onto specific dates
  • Log focused study time
  • Review progress by subject
  • Pomodoro and countdown timers
  • White noise for focus
  • Syncs with Apple Watch
Features
Read full description

The worst part of exam prep is not working hard - it is not knowing whether you have done enough. Why do you ace physics? Because the total hours added up - quantity turned into quality. Why do the words stick? Because of those two focused hours, every day. SAT, AP, finals, bar exam, USMLE: it all comes down to one question - have you done enough? coves is the tool that records that quantity and shows it back to you. WHAT IT DOES INSTEAD OF YOU • Break down: turn one big goal (say, calculus) into tasks you can finish today • Schedule: drop those tasks onto real dates, so the plan exists before the week starts • Measure: log what you actually did - how much, how long you focused • Review: plan and reality side by side, so you see which subject is short HOW FAR YOU ARE: NUMBERS BEAT FEELING Total hours for maths, total hours for vocabulary, completion per subject - counted and shown separately. Enough quantity and the result follows. You will see it in your own numbers. WHILE YOU STUDY, IT KEEPS YOU SEATED Pomodoro, countdown, white noise - one tap and you are in focus mode. When it ends, it logs straight into the day's total. No catch-up later. Widgets and Apple Watch stay in sync. coves is the study tool for exam prep: break down, schedule, measure, review - one loop, closed. SUBSCRIPTION DETAILS coves Membership offers a monthly subscription ($2.99/month), a yearly subscription ($19.99/year), and a lifetime purchase ($29.99). Subscriptions auto-renew unless auto-renew is turned off at least 24 hours before the end of the current period. Any unused portion of a free trial period (if offered) will be forfeited when you purchase a subscription. Manage or cancel anytime in Settings > Apple ID > Subscriptions. Privacy Policy: https://www.softwindlab.com/privacy.html Terms of Use (EULA): https://www.softwindlab.com/products/coves/terms YOUR DATA STAYS YOURS No account, no ads, no analytics. We don't collect your name, phone number or location, and we never upload what you record - it stays on this device and in your own iCloud.

About

数日

Features
Read full description

生日、旅行、考试、工作期限,或和某个人一起走过的日子,都可以记在「数日」里。未来的日期看倒数,过去的日期看已过天数,到了当天统一显示「就是今天」。 添加名称、日期和图标,用自定义分类整理记录;同一事件也能归入多个分类。支持按天、周、月、年和自定义间隔重复,并可设置当天通知、提前几天或几周提醒。 多种桌面与锁屏小组件,让重要日期更容易看见。还有事件归档与恢复、一次性事件过期自动归档,以及深色界面和时间状态配色。 支持简体中文和英文,核心记录功能可离线使用,无需另行注册账号。订阅续费日可以手动记录,数日不负责识别订阅、扣费或取消。

Screenshots

Coves4 screens
数日4 screens

Verdict

The call

The clearest difference is price: Coves at Free against 数日's $0.99. Coves also leads on device support (3 vs 1). 数日's advantage is in-app purchases (none vs 3). On update cadence, ads 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

Coves is free to download; 数日 costs $0.99 up front. Coves sells 3 in-app purchases, starting at $2.99 per month. 数日 asks for nothing beyond the download.

UpkeepUpdate frequency

Coves ships an update fortnightly, 数日 every 8 days. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 7 level
Coves versus 数日: the parameters behind the verdict, then further details
ParameterCoves数日
PriceFree — better$0.99
Rating4.2 (11 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings11 — better—
Update frequencyFortnightlyEvery 8 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size113 MB8 MB
Age rating4+4+
Developer朋 潘敏 闵

In-app purchases

3 purchases

Coves

Subscriptions2
  • Monthly$2.991 Month
  • Annual$19.991 Year
One-time1
  • Lifetime Access$29.99
None

数日

No in-app purchases

Questions

Is Coves free?
Coves is free to download, with in-app purchases available.
Is 数日 free?
数日 costs $0.99, with no in-app purchases.
Do Coves or 数日 have ads?
Neither Coves nor 数日 shows ads.
Which is updated more often, Coves or 数日?
Coves ships an update fortnightly, and 数日 every 8 days. Most recently, Coves was updated on November 11, 2026 and 数日 on November 6, 2026.

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