Comparison

Grace Care vs ZukiLog

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

Head to head
About

Grace Care

This app offers doctor-supervised femtech support for women's health. It provides accurate predictions for ovulation and menstruation, even for irregular cycles, and offers personalized advice based on user data. It also includes features for ovarian age assessment and access to expert consultations and clinic partnerships.

Highlights
  • Doctor-supervised femtech support
  • Accurate ovulation and period prediction
  • Personalized expert advice
  • Ovarian age and egg count prediction
  • Q&A with supervising doctor
  • Fertility and health information articles
  • Partnerships with fertility clinics
Features
Read full description

◇すべての女性に寄り添う、医師監修のフェムケアサポートアプリ◇ 妊娠しやすい時期、妊娠しづらい時期がひとめでわかり、これまで予測が難しかった生理不順にも対応。 一人一人の周期と妊娠希望に合わせて、入力データを元に専門医のアドバイスがもらえます。 生理、妊活、婦人科系の病気…人には相談しづらい女性のカラダの悩みをGrace Careが解決します! ◇こんな方へオススメです◇ ・生理不順で次回の生理日が分からず予定が立てられない ・妊活を始めたいけれど何からやれば良いの? ・不妊治療を続けているけれど、なかなか授かれず悩んでいる ・生理、排卵、卵管、子宮など、婦人科系の悩みがある ・冷え症やPMS、基礎体温のばらつきなど、自分の体質に不安がある ・専門家のアドバイスがほしい ◇あなたをサポートする5つの特徴◇ --------業界初!アプリで卵巣年齢(AMH値)診断-------- 日々の生理・排卵・基礎体温記録をもとに、あなたの卵巣年齢&卵子保有数を予測します。卵子の数は、妊活や女性の身体において、とても重要なキーワードです。あなたの今の卵子&卵巣の状態をチェックして、将来に向けて自分に合った計画を立ててみましょう。 ※生理周期が安定している場合、実測値に近い数字の予想が可能ですが、より正確な値を把握するために、提携クリニックでの採血による検査をお勧めします。 --------より正確な排卵・生理予測-------- 杉山産婦人科理事長の杉山力一先生の、25年にわたる不妊治療の研究実績をもとに生まれた独自ロジックで、生理&排卵日を予測します。 これまで、生理不順で先々の予定が立てられずに悩んでいた方や、排卵日がわからず妊活のタイミングがつかめなかった方、それぞれの希望にフィットした予測を実現しました。 --------先生にお悩み相談-------- 監修医である杉山先生へのQ&Aを公開中 生理のコト、妊活のコト、体調のコト… あなたの抱えているお悩みのヒントも発見できるかも! --------医師監修コラム・妊活情報-------- 妊活・生理から美容や健康の情報まで、あなたの生活にきっと役立つ情報が満載です。 --------全国の厳選生殖医療クリニックと提携-------- 生殖医療の分野で確かな実績を誇る全国の提携クリニックにおいて、婦人科や生殖医療の診療を受けることができます。アプリ内から各クリニックの予約画面にダイレクトに遷移でき、病院選びのお悩みを解決します。 ◇利用規約・プライバシーポリシー◇ https://www.eggslab.jp/#sec13 ◇お問い合わせ◇ 恐れ入りますが、ご不明な点や不具合などがございましたら、下記までお問い合わせいただきますようお願いいたします。 https://www.eggslab.jp/#sec11

About

ZukiLog

Features
Read full description

ZukiLog is a headache diary for people who live with migraines and weather-related headaches. When your doctor asks "when do your headaches tend to happen?", it is hard to answer. ZukiLog logs your headaches, medication, sleep, and barometric pressure together, then runs on-device statistics and charts to show how your headaches line up with pressure and sleep. - LOG IN 3 TAPS: When pain hits, just tap the intensity. Symptoms and notes are optional, and you can jot down anything else you notice. Log medication with one tap and rate how well it worked later. - AUTOMATIC PRESSURE & SLEEP: Barometric pressure is fetched for your area automatically. Sleep is imported from Apple Health. - PERSONAL CORRELATION ANALYSIS: ZukiLog estimates whether pressure drops or short sleep is more closely linked to your headaches, all computed on your device. - DOCTOR-READY 90-DAY REPORT (Pro): Export the last 90 days of attack counts, medication effectiveness, and the correlation analysis as an A4 PDF you can show your doctor. - PRIVACY FIRST: Logging, analysis, and report generation all happen on your device. Your health data is never sent to external servers. ZUKILOG PRO (AUTO-RENEWABLE SUBSCRIPTION) ZukiLog Pro unlocks the PDF report and 90-day long-term analysis. - Yearly plan: JPY 2,400 per year, with a 7-day free trial for first-time subscribers - Monthly plan: JPY 480 per month Prices may vary by region and are shown in the app before purchase. - Payment is charged to your Apple ID account at confirmation of purchase. - The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the free trial or current period. Your account is charged for renewal within 24 hours before the end of the current period. - You can manage or cancel your subscription anytime in Settings > Apple ID > Subscriptions. - Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gist.github.com/el-el-san/924ca3b245a6e3b7f8a0f6fbccf8e3b6 ZukiLog is not a medical device; it is a tool for keeping records. The analysis is reference information based on your records. Please consult your doctor for any medical decisions. If your symptoms continue, please see a medical professional.

Screenshots

Grace Care4 screens
ZukiLog4 screens

Verdict

The call

The clearest difference is in-app purchases: Grace Care at none against ZukiLog's 2. Grace Care also leads on iOS requirement (15.4 vs 17.0). ZukiLog's advantage is ads (none vs shown). 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. ZukiLog sells 2 in-app purchases, starting at $2.99 per month. Grace Care asks for nothing beyond the download.

UpkeepUpdate frequency

Grace Care ships an update every 3 months, ZukiLog every 4 months. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 7 level
Grace Care versus ZukiLog: the parameters behind the verdict, then further details
ParameterGrace CareZukiLog
PriceFreeFree
Rating4.5 (70 ratings) — better—
Positive reviews22.0% of reviews—
Number of ratings70 — better—
Update frequencyEvery 3 months — betterEvery 4 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.4 — better17.0
Further details — not scored
Size33 MB1 MB
Age rating12+4+
DeveloperEggs Co., Ltd.Kenichi Nagamatsu

In-app purchases

None

Grace Care

No in-app purchases

2 purchases

ZukiLog

Subscriptions2
  • ZukiLog Pro$2.991 Month
  • ZukiLog Pro Yearly$14.991 Year

Questions

Is Grace Care free?
Grace Care is free to download, with no in-app purchases.
Is ZukiLog free?
ZukiLog is free to download, with in-app purchases available.
Do Grace Care or ZukiLog have ads?
Grace Care shows ads; ZukiLog does not.
Which is updated more often, Grace Care or ZukiLog?
Grace Care ships an update every 3 months, and ZukiLog every 4 months. Most recently, Grace Care was updated on November 6, 2026 and ZukiLog on November 10, 2026.

Other comparisons