calculator HD⁻ vs 倒计时
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
calculator HD⁻
A powerful and intuitive calculator app designed for simplicity and beauty. It offers a complete record of operations that can be reviewed and edited, along with scientific functions and multiple themes. Enjoy enhanced functionality with an optional subscription.
- Records operation process
- Check and edit operations
- Elegant and intuitive interface
- Displays equation and result simultaneously
- Supports scientific functions
- Multiple themes
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This app uses the basic functions of the calculator to make the simplest, best calculator in the app store. And it can record the operation process completely, and can check and edit at any time. Designed with simplicity, usability and beauty in mind! Elegant & Intuitive interface Displays both the equation & the result at the same time Supports many scientific functions Multiple themes Application subscription: 1. Subscription Service: Quarterly Member (3 months) 2. Subscription price: ￥18 / quarter for consecutive quarterly membership 3. Payment: After the user confirms the purchase and the payment is credited to the iTunes account 4. Apple iTunes account will deduct the fee within 24 hours before the expiration, and the subscription cycle will be extended by one after the successful deduction 5. During the subscription period, you can use all key sounds to calculate data 6. The subscription will be automatically renewed for the same price and period (one year) as before, unless the automatic renewal is closed at least 24 hours in advance before the end of the current subscription period 7. After purchase, users can manage subscription and turn off automatic renewal in account Settings. For more information please go to: http://support.apple.com/kb/ht4098" Please refer to the following links for terms of Service and Privacy policy: Privacy policy: https://cdn.40sishi.com/app/resources/jisuanqihd/privacy.html Service agreement: https://cdn.40sishi.com/app/resources/jisuanqihd/vipservice.html The price is equal to the price of a subscription in DOLLAR terms specified in Apple's App Store Pricing Table.
倒计时
This app helps you count down to important dates like anniversaries, birthdays, and holidays. Set reminders to never miss special moments and track your daily life with a built-in diary. It also features a community group for sharing experiences and reminders.
- Countdown to important dates
- Set custom reminders
- Track birthdays and anniversaries
- Daily diary function
- Built-in community group
- Record special moments
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这个应用是一个倒计时工具，主要用于倒数纪念日和重要事件的倒计时。它可以轻松地记录和追踪生日、结婚纪念日、毕业纪念日、假期和其他个人或团队的特殊日期。用户可以设置提醒，确保不会错过这些特殊时刻，并在特定日期或时间时收到提醒。该应用可以在智能手机上运行，用户可以随时随地访问和更新他们的倒计时。内置交流群组功能：可以互相提醒特殊日期的设置，分享使用经验。日记功能记录您每一天的日常生活，开心的不开心的事情都可以记录下来哦。 关于程序内提供订阅付费功能： 您可以在程序内使用 iTunes 自动续订功能获取会员专属功能，我们提供以下套餐。 周会员（¥28.00） 前3天免费 月会员（¥68.00） 年会员（¥298.00） 确认购买后，将会从您的 iTunes 帐户中收取费用。您可以在每个周期结束至少 24 小时前取消下个周期的订阅，每个周期结束 24 小时内将会自动续订，已订阅的周期将无法取消。 隐私政策： https://docs.qq.com/doc/DUXB5VlFWTkx1c2VJ 用户协议： https://docs.qq.com/doc/DUXpoSXJRTkpmb09x 技术支持： https://docs.qq.com/doc/DUVNjUUdEQ0hIblBY
Screenshots
Verdict
The clearest difference is rating: 倒计时 at 5.0 against calculator HD⁻'s 4.5. 倒计时 also leads on update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (11.0 vs 13.0). calculator HD⁻'s advantage is ratings volume (2.5K vs 1). On price, ads, in-app purchases and monetization model 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. calculator HD⁻ sells 6 in-app purchases, starting at $2.99 per 3 months and 倒计时 sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
倒计时 holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: calculator HD⁻ has 2.5K ratings behind it against 1, so its average is the more settled of the two.
calculator HD⁻ ships an update every 6 weeks, 倒计时 every 3 weeks. The most recent releases landed on September 23, 2026 and June 7, 2026 respectively.
| Parameter | calculator HD⁻ | 倒计时 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2.5K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 61.1% of reviews | — |
| Number of ratings | 2.5K — better | 1 |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 97 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing four time ledo Technology Co., Ltd. | 浩 陈 |
Customer experience
calculator HD⁻
倒计时
Bugs and requests
calculator HD⁻
Reported bugs
2 issues- Incorrect calculation results
- Compatibility issues with new devices
Requested features
3 requests- More customization options
- Improved user interface
- Free version without ads
倒计时
Not enough reviews yet to summarise bugs or requests.
In-app purchases
calculator HD⁻
- auto season vip$2.993 Months
- 连续年会员$3.991 Year
- 深色主题$0.99
- 周会员$0.99
- 高级会员$14.99
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- 超级会员$14.99
倒计时
- 周会员3 Days trial$3.997 Days
- 月会员$9.991 Month
- 年会员$39.991 Year
