Comparison

ねむカフェ vs Caffeine Tracker

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

Head to head
About

ねむカフェ

This app helps you manage caffeine intake by calculating how much remains in your body based on what you drink and your bedtime. It provides personalized recommendations to help you enjoy caffeinated beverages without compromising your sleep.

Highlights
  • Caffeine remaining calculation
  • Personalized half-life settings
  • 3-stage intake recommendations
  • Customizable beverage list
  • Consumption logging
  • Home screen widget
Features
Read full description

「この時間にコーヒー、今飲んで大丈夫?」 「エナジードリンクを飲むと、夜に影響しそう?」 そんな迷いを、就寝時刻から逆算して1タップで確認できます。 ねむカフェは、飲んだカフェイン量とあなたの就寝時刻をもとに、就寝時に体内に残るカフェイン量の目安を計算します。コーヒー、お茶、エナジードリンクなどを飲む前にチェックすることで、カフェインと上手に付き合うための判断をサポートします。 こんな方へ ・午後のコーヒーで夜の寝つきが気になる ・エナジードリンクを飲みたいけど、夜への影響が不安 ・カフェインを何時まで飲んでいいか分からない ・コーヒーやお茶を楽しみながら、睡眠にも配慮したい ・自分のカフェイン感受性を把握したい ねむカフェの特徴 「今飲んでもOK?」を1タップで確認 飲む前にアプリを開いて飲料を選ぶだけ。就寝時刻に体内に残るカフェイン量を推定し、3段階の目安で表示します。 ・問題なし:影響は少なめの見込み ・控えめに:量を調整したいタイミング ・今日はやめとく:就寝時刻に残りやすい見込み あと何mg飲めるかが分かる 「今日はあと180mgまで」など、残りの目安量を表示。数字だけでなく、コーヒー何杯分に近いかもイメージしやすく確認できます。 あなたに合わせた半減期設定(カフェインが体から抜けるまでの時間の個人差) カフェインの感じ方には個人差があります。ねむカフェでは、年齢、喫煙習慣、感受性などをもとに、カフェインが体から抜けるまでの時間(半減期)をあなた向けに設定できます。 主要なカフェイン飲料に対応 コーヒー、カフェラテ、紅茶、緑茶、エナジードリンク、栄養ドリンク、チョコレート系など、日常でよく飲む・食べるカフェイン食品を選べます。自分で飲料を追加することもできます。 記録とウィジェットで継続しやすい 飲んだカフェインを記録して、体内残量や履歴を確認できます。ホーム画面ウィジェットを使えば、アプリを開かなくても現在の目安をすばやく確認できます。 こんな場面で使えます ・コンビニでコーヒーを買う前に確認。就寝時刻への影響が少なそうなら、安心して楽しめます。 ・夕方エナジードリンクを飲むか迷ったときにチェック。控えめ表示なら、量を減らす判断に。 ・寝る前に今日のカフェイン残量を確認。明日以降の飲み方の参考にできます。 ご利用にあたって ねむカフェは医学的な診断、治療、睡眠改善を目的としたアプリではありません。表示される数値や判定は、カフェイン摂取量と半減期モデルにもとづく生活上の目安です。 カフェインの影響には個人差があります。妊娠中・授乳中の方、持病のある方、服薬中の方、体調に不安がある方は、医師などの専門家にご相談ください。 ご意見・ご要望 「この飲料を追加してほしい」「この機能があると便利」などのご意見は、フィードバックからお寄せください。

About

Caffeine Tracker

Features
Read full description

How much caffeine is actually in your body right now? Coffy answers that with a live half-life curve — not a list of cups you drank and forgot about. WATCH IT LEAVE YOUR SYSTEM Every drink you log is plotted on a real metabolic curve. Coffy shows the milligrams still active in your body at this moment, and tunes the half-life to your own sensitivity: 4, 5 or 7 hours. YOUR CUT-OFF TIME Set your bedtime and Coffy works out the last safe cup of the day — the point after which you would still be above the 50 mg sleep threshold when your head hits the pillow. It also projects how many mg you will have left at bedtime, before you pour the next one. TAPER INSTEAD OF QUITTING COLD TURKEY Pick a starting point and a goal, and Coffy builds a weekly taper plan — around 50 mg less each week — then tracks you against this week's target. Cut back without the headaches. Pause or adjust the pace whenever life gets in the way. NUMBERS YOU CAN ACTUALLY TRUST Caffeine values come from USDA FoodData Central, the FDA and peer-reviewed studies, and every drink shows you its source. Espresso, americano, latte, cappuccino, cortado, macchiato, mocha, matcha, tea, cola and energy drinks are built in — add your own for anything else. WATER TOO Track glasses of water alongside your caffeine, with gentle reminders through the day. HISTORY THAT MEANS SOMETHING Week, month and year views, your daily average, how it compares with the period before, and how many days you went over your limit. Day streaks and badges for days under your limit and nights with no late cup. REMINDERS THAT RESPECT YOUR SLEEP A cut-off alert, water reminders and an evening check-in — each one switchable. APPLE HEALTH & CSV Sync your caffeine intake to Apple Health, and export everything to CSV whenever you want it. Coffy is not trying to make you quit. It is here so you can time it right: full energy when you need it, clean sleep when you want it. Payment & Subscription Information: - Payment is charged to your Apple Account at confirmation of purchase. - Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. - Your account is charged for renewal within 24 hours prior to the end of the current period. - You can manage your subscriptions and turn off auto-renewal in your account settings after purchase. - No refund is provided for the unused portion of a subscription. Privacy Policy: https://desing304.github.io/caffeine-tracker-legal/privacy.html Terms of Use: https://desing304.github.io/caffeine-tracker-legal/termsofuse.html

Screenshots

ねむカフェ4 screens
Caffeine Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: ねむカフェ at none against Caffeine Tracker's 3. ねむカフェ also leads on iOS requirement (13.0 vs 16.4). Caffeine Tracker's advantage is ads (none vs shown) and update cadence (weekly vs every 6 weeks). On price 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. Caffeine Tracker sells 3 in-app purchases, starting at $3.99 per 7 days. ねむカフェ asks for nothing beyond the download.

UpkeepUpdate frequency

ねむカフェ ships an update every 6 weeks, Caffeine Tracker weekly. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 4 level
ねむカフェ versus Caffeine Tracker: the parameters behind the verdict, then further details
ParameterねむカフェCaffeine Tracker
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 6 weeksWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size36 MB79 MB
Age rating4+4+
DeveloperKAZUKI SHIOTSUKIEMIR YAVCIN

In-app purchases

None

ねむカフェ

No in-app purchases

3 purchases

Caffeine Tracker

Subscriptions2
  • Premium Weekly$3.997 Days
  • Premium Yearly3 Days trial$24.991 Year
One-time1
  • Lifetime Premium$39.99

Questions

Is ねむカフェ free?
ねむカフェ is free to download, with no in-app purchases.
Is Caffeine Tracker free?
Caffeine Tracker is free to download, with in-app purchases available.
Do ねむカフェ or Caffeine Tracker have ads?
ねむカフェ shows ads; Caffeine Tracker does not.
Which is updated more often, ねむカフェ or Caffeine Tracker?
ねむカフェ ships an update every 6 weeks, and Caffeine Tracker weekly. Most recently, ねむカフェ was updated on October 22, 2026 and Caffeine Tracker on October 16, 2026.

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