Comparison

Valan vs Glucose Challenge

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

Head to head
About

Valan

Features
Read full description

【Valan】の公式アプリが登場。アプリを通して【Valan】の新着情報やお得な情報を受け取ることができます。また、いつでもお手元のスマートフォンから、メニューやご希望のお時間帯のチェック・ご予約などが可能です。アプリをインストールしていただくことにより【Valan】を、より便利に身近にご利用していただけます。 【主なおすすめ機能】 ◆予約機能◆ いつでもお手元のスマートフォンからご希望のお時間帯のチェック・ご予約が可能です。 ◆お得なクーポン発行◆ サロンで使用できるお得なクーポンがアプリを通して発行されご利用いただけます。 ◆来店スタンプカード◆  ご来店スタンプをためるとお得なクーポンが発行されます(ご利用条件がある場合がございます) ◆マイページ◆ 過去の施術履歴やスタンプ数など、お客様の情報を確認することができます。 ◆電話ボタンで簡単アクセス◆ ワンタップで簡単にサロンへ電話が可能です。 ◆新着情報の配信◆  【Valan】の最新ニュースをいつでも受け取ることができます。 【ご注意】 ・機種の仕様によって表示の仕方が若干異なる場合がございます。

About

Glucose Challenge

This app helps you manage blood sugar through daily meals and actions without needing a sensor. It suggests personalized carb targets based on your weight goals and provides actionable habits derived from real user data to help prevent blood sugar spikes.

Highlights
  • Personalized daily carb targets
  • AI-powered meal carb estimation
  • Daily habit tracking
  • Glycation and Spike Score
  • Estimated HbA1c and diabetes risk
  • Meal suggestions based on goals
  • Weight and carb graphs
Features
Read full description

Get your daily carb target from your goal weight. Build blood-sugar-care habits — no needles required. Understanding blood sugar has traditionally meant wearing a sensor on your arm. Glucose Challenge helps you build lasting habits through your daily meals and actions — no sensor needed. ■ Start with your goal weight Enter your current and goal weight, and we'll suggest a daily carb target that fits you (Gentle 130g / Recommended 100g / Strict 70g). If you have a larger gap to close, we suggest starting with a sustainable target and stepping down after a month. Strict limits mean nothing if you can't keep them up. That target becomes the goal line on your daily graph — so you always know how much you have left today. ■ Built on data from 300+ participants Since 2020, over 300 people have worn a medical glucose sensor (FreeStyle Libre) while logging their meals and daily actions. That data shows, in numbers, which habits raise blood sugar and which ones help prevent spikes. A healthcare professional reviews that data and turns it into the actions you should take today. ■ Blood sugar isn't only about food Sleep, exercise, stress — all of it affects your blood sugar. So the habits you receive go beyond what's on your plate. ■ Two things to do each day 【1. Photograph your meal】 One photo is all it takes. AI estimates the carbs — no typing, no calculating. Every entry stacks up on your graph, so you can see at a glance whether you've passed your target. 【2. Check off today's actions】 "Vegetables first." "A short walk after eating." Habits arrive each day. Just tap whether you did it or not. ■ These two become your scores Your logged carbs and your habit completion rate feed into your Glycation Score and Spike Score. Your estimated HbA1c and 5-year diabetes risk appear on the dashboard too. No needles — and you can still see where you stand, in numbers. That's what 300+ participants' real data makes possible. ■ The longer you go, the further you get Your avatar evolves from Lv1 to Lv3 as your completion rate rises, and each level unlocks the next stage of habits. You start where you are, and build from there. ■ No more wondering what to eat Pick your goal (clear skin, weight care, anti-aging, wellness, diabetes prevention) and your situation (weekday lunch, dinner), and you'll get specific options for convenience stores, dining out, and home cooking. Repeat it daily, and eventually you'll choose well without opening the app. That's the goal of this program. ■ Also included ・Daily and weekly weight graphs with a goal line ・Carb breakdown per meal, plus advice to help prevent spikes 【Who this is for】 ・You spend on skincare, but your skin still isn't where you want it ・You've tried diets before and gained it back ・Your blood sugar or HbA1c came up at your last checkup ・You're busy, and detailed logging or calorie counting never sticks 【Subscription plans】 A 3-day free trial gives you access to everything. ・Basic (¥1,100/mo): Unlimited AI photo analysis, daily habits,  dashboard ・Standard (¥1,650/mo): Basic plus meal programs for weight care,  beauty, anti-aging, and wellness ・Premium (¥2,200/mo): Everything, including the healthcare-  supervised diabetes-prevention program and 5-year risk insights *Results vary by individual. No outcome is guaranteed. 【Medical disclaimer】 Estimated HbA1c, diabetes risk scores, and AI meal analysis in this app are simulations based on the data you enter. This app is not a medical device and does not provide medical diagnosis or definitive test results. For accurate measurement or any health concerns, please consult a physician. Terms: https://health-app-policy.quiet-time.jp/kiyaku Privacy: https://health-app-policy.quiet-time.jp

Screenshots

Valan3 screens
Glucose Challenge4 screens

Verdict

The call

The clearest difference is in-app purchases: Valan at none against Glucose Challenge's 5. Valan also leads on iOS requirement (13.0 vs 15.1). Glucose Challenge's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads 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. Glucose Challenge sells 5 in-app purchases, starting at $5.99 per month. Valan asks for nothing beyond the download.

UpkeepUpdate frequency

Valan ships an update every 6 weeks, Glucose Challenge every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 5 level
Valan versus Glucose Challenge: the parameters behind the verdict, then further details
ParameterValanGlucose Challenge
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size30 MB59 MB
Age rating4+12+
Developer株式会社EPARKリラク&エステKengo Nomura

In-app purchases

None

Valan

No in-app purchases

5 purchases

Glucose Challenge

Subscriptions5
  • Basic Plan3 Days trial$5.991 Month
  • Premium Coupon 50$5.991 Month
  • Standard Plan3 Days trial$9.991 Month
Show 2 more
  • Premium Coupon 25$9.991 Month
  • Premium Plan3 Days trial$11.991 Month

Questions

Is Valan free?
Valan is free to download, with no in-app purchases.
Is Glucose Challenge free?
Glucose Challenge is free to download, with in-app purchases available.
Do Valan or Glucose Challenge have ads?
Neither Valan nor Glucose Challenge shows ads.
Which is updated more often, Valan or Glucose Challenge?
Valan ships an update every 6 weeks, and Glucose Challenge every 2 weeks. Most recently, Valan was updated on November 3, 2026 and Glucose Challenge on October 31, 2026.

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