Comparison

WeightUp | 太りたい人のための増量アプリ vs Gain Weight

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

Head to head
About

WeightUp | 太りたい人のための増量アプリ

Features
Read full description

WeightUp は「太りたいのに太れない」という悩みを解決するために生まれた増量サポートアプリです。 毎日の食事をカメラで撮るだけでAIがカロリーを自動推定し、あなた専用の増量プランを作成。 面倒な記録は不要、続けやすい仕組みで増量できるので、理想の体を目指せます。 ◆ できること ◆ ・食事を撮るだけでカロリーを自動解析(AIによる高精度推定) ・一人ひとりに合わせた増量プランを自動生成 ・1日の摂取カロリーをグラフで可視化し、成長を実感 ・目標体重と達成日を設定して、計画的にステップアップ ・おすすめ食事例を参考にして「何を食べたらいいか」に迷わない ・通知機能で食べ忘れを防ぎ、継続をサポート ◆ WeightUp が選ばれる理由 ◆ ・「撮るだけ」でラクに続けられる ・AIが自動で分析するから正確で安心 ・太りたい人専用だから、欲しい情報だけが手に入る ・毎日の小さな積み重ねが、あなたの未来を変える ◆ あなたにおすすめ ◆ ・食べても体重がなかなか増えない人 ・筋トレや肉体改造を効率的に進めたい人 ・痩せすぎを改善して、健康的で魅力的な体を目指したい人 WeightUp はあなたの「太りたい」を「太れた!」に変えるためのパートナーです。 今すぐ始めて、理想の未来の自分に一歩近づきましょう。 --- ## サブスクリプションについて 本アプリには有料のプレミアムプラン(自動更新サブスクリプション)が含まれます。 サブスクリプションは iTunes アカウントから管理・解約可能です。キャンセルしない限り自動更新されます。 --- ## 利用規約・プライバシーポリシー - プライバシーポリシー(WeightUp): https://www.notion.so/2811ae37949a806ab699ff66706f5083?pvs=21 - 利用規約(WeightUp): https://www.notion.so/WeightUp-2811ae37949a80fa896fc8f4e7930e0f?pvs=21 - Apple標準EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ --- ※本アプリは一般的な健康管理を目的とした情報提供サービスです。 体調に不安がある場合は、医師や専門家にご相談ください。

About

Gain Weight

This app helps users track calorie intake specifically for gaining weight and muscle mass. It offers quick meal logging via photo recognition and provides personalized targets based on user stats and goals. Data is kept private on the device with optional iCloud sync.

Highlights
  • Bulk-first calorie targets
  • AI-powered photo meal logging
  • One-gesture logging for weight and portions
  • Clear home screen with daily progress
  • Trend-based weight tracking
  • Privacy-focused, no account needed
Features
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StackCal is the calorie tracker built for bulking, not cutting. Most nutrition apps assume you're trying to lose weight. StackCal flips the script. If you're trying to gain muscle, gain mass, or just stop under-eating, StackCal answers the one question that actually matters: "How much more do I need to eat today?" WHY STACKCAL - Bulk-first targets — Personalized BMR, TDEE, and surplus calculations based on your stats and goals. - 5–10 second logging — Snap a photo of your meal and let AI recognize the food and estimate calories. No barcode scanning, no database fumbling. - One dial for everything — Log weight and adjust portion sizes with the same analog dial. One gesture to learn. - Nothing hidden — Today's calories, what you ate, and your weight all live on the home screen. - Trend-based weight — See your moving average instead of fighting daily fluctuations. DESIGNED FOR CLARITY Three rules guide every screen: information is never hidden, the same gesture always means the same thing, and every tap produces a visible response. The result is an app you can use one-handed, post-workout, with sweaty fingers. PRIVACY FIRST - No account required. - Your meals, weight, and profile stay on your device. - Optional iCloud sync uses your private CloudKit container — we never see your data. - No ads. No IDFA. No tracking pixels. SUBSCRIPTION A free tier covers core logging. The subscription unlocks photo-based food recognition and advanced trend analysis. Cancel anytime in iOS Settings. Built for lifters who eat to grow. TERMS OF USE Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

WeightUp | 太りたい人のための増量アプリ4 screens
Gain Weight4 screens

Verdict

The call

The clearest difference is update cadence: Gain Weight at daily against WeightUp | 太りたい人のための増量アプリ's every 3 months. Gain Weight also leads on iOS requirement (17.0 vs 26.0). 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. WeightUp | 太りたい人のための増量アプリ sells 2 in-app purchases, starting at $3.99 per 7 days and Gain Weight sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

WeightUp | 太りたい人のための増量アプリ ships an update every 3 months, Gain Weight daily. The most recent releases landed on June 13, 2026 and September 23, 2026 respectively.

Scorecard2 real differences · 5 level
WeightUp | 太りたい人のための増量アプリ versus Gain Weight: the parameters behind the verdict, then further details
ParameterWeightUp | 太りたい人のための増量アプリGain Weight
PriceFreeFree
Update frequencyEvery 3 monthsDaily — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad — betteriPhone
Requires iOS26.017.0 — better
Further details — not scored
Size5 MB17 MB
Age rating17+4+
DeveloperJimpei YamamotoMoo & Company

In-app purchases

2 purchases

WeightUp | 太りたい人のための増量アプリ

Subscriptions2
  • プレミアム1週間$3.997 Days
  • プレミアム1ヶ月3 Days trial$6.991 Month
2 purchases

Gain Weight

Subscriptions2
  • StackCal Pro 月額プラン7 Days trial$9.991 Month
  • StackCal Pro 年額プラン7 Days trial$49.991 Year

Questions

Is WeightUp | 太りたい人のための増量アプリ free?
WeightUp | 太りたい人のための増量アプリ is free to download, with in-app purchases available.
Is Gain Weight free?
Gain Weight is free to download, with in-app purchases available.
Do WeightUp | 太りたい人のための増量アプリ or Gain Weight have ads?
Neither WeightUp | 太りたい人のための増量アプリ nor Gain Weight shows ads.
Which is updated more often, WeightUp | 太りたい人のための増量アプリ or Gain Weight?
WeightUp | 太りたい人のための増量アプリ ships an update every 3 months, and Gain Weight daily. Most recently, WeightUp | 太りたい人のための増量アプリ was updated on June 13, 2026 and Gain Weight on September 23, 2026.

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