Comparison

SleepPlan vs Big Days

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

Head to head
About

SleepPlan

Features
Read full description

倒推你的最佳入睡时间,按科学的90分钟睡眠周期推荐最合适的入睡点,帮你清醒起床、精神满格。 只需选择明日的起床时间,SleepPlan 即时给出“最佳/次佳/最低健康”三档方案,并可一键设置睡前提醒与起床闹钟。 支持深色模式、个性化偏好、使用统计与历史记录,打造你的高质量睡眠习惯。 • 主要功能: • 智能推荐: 基于90分钟睡眠周期,三档入睡方案 • 一键提醒: 睡前通知(提前30分钟)与起床闹钟 • 历史与统计: 自动记录并生成一周使用统计 • 个性化设置: 首选周期数、提醒开关、闹钟声音 • 视觉表盘: 入睡-起床时间段清晰可见 • 外观适配: 深/浅色主题,随系统同步 • 适合人群: • 需要早起但难以入睡/起床的人 • 想建立稳定作息、优化精神状态的学生与打工人 • 注重效率与健康的自律人士 • 我们的不同: • 反向规划,面向“起床目标”倒推入睡点 • 不采集个人数据,所有数据保存在你的设备本地 • 一步到位的提醒配置,避免错过最佳入睡窗口

About

Big Days

A minimalist app to track important future and past dates with a clean interface. Easily manage events, add notes, and receive local reminders. Offers home screen widgets for quick access.

Highlights
  • Count down and count up for events
  • Highlight events happening today
  • Edit, pin, and add notes to events
  • Home screen widgets for progress
  • Local reminders with repeat rules
  • iCloud sync across devices
Features
Read full description

Big Days is a minimalist app focused on managing your important dates. Why choose Big Days: Native experience: Built with SwiftUI and iOS-native interactions for smooth and stable performance Minimal design: Clear information hierarchy so your most important dates are visible at a glance Simple workflow: Create events in just a few steps with no learning curve Core features: Count down and count up: Track days remaining for future events and days passed for past events Today highlight: Events happening today are clearly emphasized so you never miss a key moment Event management: Edit, pin, add notes, and delete events easily Memory notes: Add multiple notes to each event to keep long-term memories Home screen widgets: Check key event progress directly from your Home Screen Local reminders: Flexible reminder preferences and repeat rules Languages and themes: Supports Chinese and English, with Auto, Light, and Dark appearance iCloud sync: Keep your data in sync across devices when enabled Great for birthdays, anniversaries, paydays, exams, trips, project milestones, and holiday countdowns. Big Days is built to stay lightweight, clear, and dependable, so every important date gets the attention it deserves.

Screenshots

SleepPlan3 screens
Big Days4 screens

Verdict

The call

The clearest difference is price: SleepPlan at Free against Big Days's $0.99. On ads, in-app purchases, 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

SleepPlan is free to download; Big Days costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 9 level
SleepPlan versus Big Days: the parameters behind the verdict, then further details
ParameterSleepPlanBig Days
PriceFree — better$0.99
Rating—4.5 (2 ratings) — better
Positive reviews—76.9% of reviews
Number of ratings—2 — better
Update frequency—Weekly
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad — betteriPhone
Requires iOS18.517.0 — better
Further details — not scored
Size3 MB3 MB
Age rating4+9+
DeveloperGuangdong Jianchuan Information Technology Co., Ltd刚 王

In-app purchases

None

SleepPlan

No in-app purchases

None

Big Days

No in-app purchases

Questions

Is SleepPlan free?
SleepPlan is free to download, with no in-app purchases.
Is Big Days free?
Big Days costs $0.99, with no in-app purchases.
Do SleepPlan or Big Days have ads?
Neither SleepPlan nor Big Days shows ads.

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