Comparison

睡眠|睡眠の記録と改善 vs NightRing

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

Head to head
About

睡眠|睡眠の記録と改善

Features
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毎日よく寝て、毎日元気に仕事をしたり遊んだりしたいです。 「どうしたらよく眠れますか?」 「このアプリを使うといいですよ。そのうち、アプリがなくても眠れるようになります」 というようなアプリを目指しています。 ■ 機能 1. 睡眠の記録 就寝時刻、起床時刻、眠りの質などを記録します。 昼寝や仮眠なども記録できます。 2. 目標設定 「睡眠を改善しよう」と思って調べると、すごくたくさんの情報が出てきます。 ・カフェインは控えた方がいい ・スマホやPCのブルーライトはよくない ・夜は電気を暗くしよう ・照明は暖色がいい ・寝る1~2時間前に風呂に入るのがベスト ・お酒も快眠を妨げる そして、人は思います。 「結局どれが効くんだ」 というわけで、そういうものを整理しました。 どういう人はどういう目標を設定すべきなのか。 一度に幾つの目標を掲げればいいのか。 目標の難易度はどれくらいであるべきか。 人間の行動データに基づいて、一つ一つデザインされています。 3. 改善の可視化 アプリを入れる前の状態と比べて、どれだけ改善したかを表示します。 ・就寝時刻 ・起床時刻 ・睡眠時間 ・眠りの質 が表示されます。(成果が分かると嬉しいですね) 4. スマホ依存対策 「寝る前のスマホが良くないなんて分かってる。でもやめられないから困っている」 という方に向けた、克服プログラムがあります。 このアプリを使ってくれた方が、毎日よく寝て、毎日もっと元気に仕事をしたり遊んだりできるようになればいいな、と思って作っています。

About

NightRing

Features
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"When did I fall asleep last night?" — NightDial answers the moment you open it. It reads the sleep data your Apple Watch or iPhone already saves to Health, and draws each night as an arc on a 24-hour dial. Zero input required. Just sleep like you always do. ■ Sleep Rings Sleep that crosses midnight stays whole on a circle. Bedtime to wake-up, one arc, one glance. ■ A calendar of rings One ring per day, a month at a time. Aligned arcs mean a steady rhythm — the messy nights stand out instantly. ■ Sleep Score Duration, rhythm, continuity, and timing — scored every morning, with the full breakdown visible. You'll know exactly what to fix. ■ Today's Note One piece of advice a day, picked for your recent sleep pattern from thousands of pre-written insights. ■ Night Vitals (Apple Watch) Heart rate, respiratory rate, blood oxygen and more, shown alongside each night. ■ Social Jet Lag See exactly how far your weekends drift from your weekdays — in minutes. Now you know why Mondays hurt. ■ Privacy Your sleep data is processed entirely on your device and never leaves it. ―――――――――― NightDial Plus (subscription) ―――――――――― The free version fully covers your last 14 days, plus today's score and advice. With Plus you get: - Your entire history, as far back as it goes - Trend charts: bedtime, wake time, score, nightly heart rate - Detailed weekday vs. weekend analysis - No ads Pricing: $0.99/month, $6.99/year (with 7-day free trial), or $16.99 lifetime. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kakovail.info/privacy/ * Requires sleep data in Apple Health (from Apple Watch, or iPhone with a sleep schedule). * NightDial shows rhythm insights only and does not provide medical evaluation or advice.

Screenshots

睡眠|睡眠の記録と改善4 screens
NightRing4 screens

Verdict

The call

The clearest difference is in-app purchases: 睡眠|睡眠の記録と改善 at none against NightRing's 6. 睡眠|睡眠の記録と改善 also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). On price, update cadence and device support 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. NightRing sells 6 in-app purchases, starting at $1.49 per month. 睡眠|睡眠の記録と改善 asks for nothing beyond the download.

UpkeepUpdate frequency

睡眠|睡眠の記録と改善 ships an update every 3 months, NightRing every 6 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 6 level
睡眠|睡眠の記録と改善 versus NightRing: the parameters behind the verdict, then further details
Parameter睡眠|睡眠の記録と改善NightRing
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews76.9% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size61 MB6 MB
Age rating4+4+
Developerbondavi Inc.Hiroyuki Kako

In-app purchases

None

睡眠|睡眠の記録と改善

No in-app purchases

6 purchases

NightRing

Subscriptions2
  • Plus Monthly$1.491 Month
  • Plus Yearly7 Days trial$11.991 Year
One-time4
  • Coffee$2.99
  • Good Burger$9.99
  • Plus Lifetime$24.99
Show 1 more
  • Dinner$29.99

Questions

Is 睡眠|睡眠の記録と改善 free?
睡眠|睡眠の記録と改善 is free to download, with no in-app purchases.
Is NightRing free?
NightRing is free to download, with in-app purchases available.
Do 睡眠|睡眠の記録と改善 or NightRing have ads?
NightRing shows ads; 睡眠|睡眠の記録と改善 does not.
Which is updated more often, 睡眠|睡眠の記録と改善 or NightRing?
睡眠|睡眠の記録と改善 ships an update every 3 months, and NightRing every 6 weeks. Most recently, 睡眠|睡眠の記録と改善 was updated on November 7, 2026 and NightRing on November 5, 2026.

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