极简计算器 vs Sunadokei
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
极简计算器
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完成加减乘除百分比和正负切换等常用计算。
Sunadokei
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Sunadokei is a sand timer you can read at a glance. Pick a time and the falling sand shows how much is left, whether it is a study block, a short break, a workout set or something on the stove. When you would rather not watch numbers, switch to a sand-only view. • Nine hourglass shapes, all free. Start with four free seasonal sand colors. • Presets for 1, 3, 5, 10, 25 or 60 minutes, or set your own time. Pause and resume anytime. • Sand-only view while you focus. Add a short note when a timer finishes. • History and accumulated sand show the time you have put in. Home Screen widget included. Free with ads: a banner on the main screen and full-screen ads that may appear after finished timers. Sunadokei Pro is a one-time purchase, not a subscription: 10 more sand colors and no ads. See the purchase screen for the current price. Privacy Policy: https://kazusa703.github.io/privacy.html Terms of Use: https://kazusa703.github.io/terms.html Support: https://kazusa703.github.io/support.html
Screenshots
Verdict
The clearest difference is in-app purchases: 极简计算器 at none against Sunadokei's 1. 极简计算器 also leads on update cadence (every 2 days vs every 5 weeks). 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
Both are free to download. Sunadokei sells 1 one-off in-app purchase. 极简计算器 asks for nothing beyond the download.
极简计算器 ships an update every 2 days, Sunadokei every 5 weeks. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.
| Parameter | 极简计算器 | Sunadokei |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Every 5 weeks |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 16 — better | 17.0 |
| Further details — not scored | ||
| Size | 16 MB | 12 MB |
| Age rating | 17+ | 4+ |
| Developer | 子幸 聂 | atsuko imai |
In-app purchases
极简计算器
No in-app purchases
Sunadokei
- Sunadokei Pro$2.99
Questions
Is 极简计算器 free?
Is Sunadokei free?
Do 极简计算器 or Sunadokei have ads?
Which is updated more often, 极简计算器 or Sunadokei?
Other comparisons
