Comparison

Evolt Active vs SAYA

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

Head to head
About

Evolt Active

Track your body composition progress with immediate insights and instant feedback. This app stores unlimited scans, profiles progress in graphs, and offers a calorie/macronutrient calculator. It also includes lifestyle and supplement questionnaires to guide your fitness journey.

Highlights
  • Body composition tracking
  • Instant feedback on progress
  • Unlimited scan storage
  • Progress graphs and charts
  • Calorie and macronutrient calculator
  • Lifestyle and supplement questionnaires
Features
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Evolt Active is the smart, progressive way to track your body composition progress. View immediate insights about your body and receive instant feedback to see how your exercise and nutrition choices affect your goals. The App stores unlimited body scans and profiles your progress in graphs and charts for easy tracking of your goals. The App has an intuitive calorie and macronutrient calculator based on your body composition, your goals, activity level and activity type. The App also houses a healthy lifestyle questionnaire to assess the impact of your daily lifestyle as well as a supplement and vitamin questionnaire. Evolt Active is your personal GPS guide to your body composition goals – it's all about you! To find a location for an Evolt body scan and start your fitness journey, download the app and discover a scanner near you. To view our Terms of Use, please visit: https://evoltactive.com/termsandconditions GENERAL DISCLAIMER (Disclaimer) The Evolt Active App (App) does not provide medical services or advice, is not designed for medical purposes and is intended for fitness use or general information only. The App does not claim to diagnose, treat or cure any disease nor investigate, replace, modify the anatomy or physiological or pathological process or state of the human body. The App should never replace professional medical advice or diagnosis. [Advice] The contents of the App (including all media, information, graphic elements and images) are for general information purposes only and do not constitute medical or professional advice. The information provided on the App is never a substitute for professional advice; and information within the App should not be relied upon as such. Consult with a medical professional before taking any action based on the information contained in the App. [Reliance] The App should not be relied on to diagnose, treat, cure, monitor or prevent any disease or state in the human body. Consult your doctor before using the App, or relying on any information contained in the App. The App does not provide medical treatment advice, users should not rely on the information contained in the App. Do not disregard medical advice or treatment conferred by a professional medical practitioner because of information accessed through the App. [Warranties] Evolt does not warrant that any information available on the App is complete, accurate, true or current. Evolt is not responsible for any course of action that you take based on the information contained in the App. By downloading and using the App, you acknowledge that you: • understand the App does not provide medical advice; • will not rely on the information in the App; • have read and understood this Disclaimer; • agree with this Disclaimer; and • agree to be legally bound by this Disclaimer. If you do not agree to be legally bound by this Disclaimer, do not download, access, register for, or use the App.

About

SAYA

Features
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SAYA(莢)は、双子・三つ子・四つ子を育てるご家族のための育児サポートアプリです。 「ひとつの莢に、ふたつ・みっつの実」。 複数の小さな命を、ひとつの家族でやさしく包んで育てていく。 SAYA は、その毎日を少しでも軽くするために生まれました。 【こんな方におすすめ】 ・双子・三つ子の妊娠中の方 ・0〜3歳の多胎児を育てるママ・パパ ・ご家族・実家・サポーターと記録を共有したい方 ・同じ多胎児家庭とつながりたい方 ・補助金や近くの安心スポットを知りたい方 【主な機能】 ■ 同時育児記録(双子・三つ子・四つ子の並列カード) 授乳・睡眠・おむつ・体温など、複数のお子様の記録を一画面で。タップひとつで「授乳した」「寝た」が記録できます。「左の子の最後の授乳から3時間12分」がリアルタイムで見えます。 ■ スワイプジェスチャーで片手記録 片手でお子様を抱いたまま記録できる。カードを左にスワイプすれば授乳、右にスワイプで寝かしつけを記録。タップで詳細入力もできます。 ■ 多胎妊娠の週次ガイド 双子・三つ子妊娠の各週ごとに気をつけたい点、次の検診の目安をお届けします。 ■ AI 多胎育児相談ボット(24時間) 気になることをチャットで相談。直近の記録を踏まえた AI が答えます。緊急性が高い場合は、適切な公的窓口へご案内します。 ※医療診断ではありません。 ■ 多胎サークル一覧(全国47都道府県) お住まいの地域の多胎サークルを地図と一覧で。参加費・頻度・連絡先を一画面で確認できます。 ■ 多胎マップ(近くの安心) ベビーカー対応店舗、小児科、保健所、産後ケア施設をマップで。ベビーカーの幅情報、レビュー、写真もユーザー投稿で充実。 ■ 自治体補助金チェッカー 住所を登録するだけで、お住まいの自治体で受けられる多胎児加算・ファミサポ・産後ケア・補助タクシー券などを自動で表示。 ■ メンタルヘルスチェック(EPDS) 月に一度、10の質問でご自身のお気持ちをチェック。スコアが高い時はそっと、信頼できる窓口とつないでくれます。 ■ 夫婦・サポーター同期(最大5人) 配偶者、おじいちゃん・おばあちゃん、ファミサポさんと記録を共有。誰が記録したかも一目でわかります。「ありがとう」のリアクションも。 ■ コミュニティ・SNS タグでつながる多胎児家庭のコミュニティ。「妊娠28週」「双子0歳」「双子3歳」など。AI による不適切投稿の事前モデレーション、24時間以内の通報対応で、安心して悩みを共有できます。 ■ SOS / 多胎119 困った時は、3段階の相談導線で。担当窓口に電話・掲示板で相談・LINE で相談。AI による症状チェッカーも。 ■ ダークモード 睡眠不足のお母さん・お父さんのため、初日からダークモード完備。 【プライバシーへの配慮】 お子様の記録、メンタルヘルス情報は厳重に保護します。EPDS スコアは原則ご本人のみが閲覧できます。広告 ID は一切取得しません。詳しくはプライバシーポリシーをご覧ください。 【医療相談について】 本アプリは医療診断・治療の代替ではありません。気になる症状や強い不調がある場合は、必ずかかりつけ医にご相談ください。緊急時は 119、子ども医療相談は #8000、救急安心センターは #7119 をご利用ください。 【ご意見・ご要望】 アプリ内 設定 →「ご意見・ご要望を送る」からお気軽にお寄せください。 ユーザーの皆さまの声を活かして改善を続けます。 【対応端末】 iOS 17.0 以降の iPhone ひとつの莢に、ふたつ・みっつの実。 すこやかな育児を、SAYA と一緒に。

Screenshots

Evolt Active4 screens
SAYA4 screens

Verdict

The call

The clearest difference is update cadence: SAYA at every 2 days against Evolt Active's fortnightly. Evolt Active's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Evolt Active ships an update fortnightly, SAYA every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Evolt Active versus SAYA: the parameters behind the verdict, then further details
ParameterEvolt ActiveSAYA
PriceFreeFree
Rating2.0 (107 ratings) — better—
Positive reviews19.2% of reviews—
Number of ratings107 — better—
Update frequencyFortnightlyEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size112 MB6 MB
Age rating17+12+
DeveloperEvolt Active合同会社Viable

Bugs and requests

Evolt Active

Reported bugs

3 issues
  • Inability to log in or reset password
  • Scan data not syncing or disappearing
  • App freezing or closing unexpectedly

Requested features

3 requests
  • Integration with Apple Health
  • More customization options
  • Improved customer support and responsiveness

SAYA

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Evolt Active

No in-app purchases

None

SAYA

No in-app purchases

Questions

Is Evolt Active free?
Evolt Active is free to download, with no in-app purchases.
Is SAYA free?
SAYA is free to download, with no in-app purchases.
Do Evolt Active or SAYA have ads?
Neither Evolt Active nor SAYA shows ads.
Which is updated more often, Evolt Active or SAYA?
Evolt Active ships an update fortnightly, and SAYA every 2 days. Most recently, Evolt Active was updated on November 3, 2026 and SAYA on October 31, 2026.

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