Partnering with Motherapp transformed Carbon Wallet from a minimum viable product into a leading green lifestyle platform. Their technical expertise and strategic insights were crucial in our rapid market entry and ongoing success. Motherapp’s commitment and personalized service not only met but exceeded our expectations, proving them to be invaluable partners in our mission to promote sustainability.
– Chester Cheng
Co-Founder, Carbon Wallet
Carbon Wallet: Green Loyalty Program for Sustainable Rewards
Looking to Build a Wellness App that Combines Sustainability, Health, and Rewards?
This case study dives into Carbon Wallet, a wellness lifestyle app developed by Motherapp, and how it transformed eco-friendly actions like walking, recycling, and public transit into meaningful reward missions—powered by GPS, Octopus integration, Google Fit, and AI recognition.
Inside the Case Study: What You’ll Learn
- What are the top ESG apps showing measurable impact and user growth for brands?
- How can apps like Carbon Wallet drive ESG goals and brand differentiation?
- What business value can a wellness lifestyle app bring to your brand?
- What tech integrations make a wellness or sustainability app smooth and easy to use?
Discover how Carbon Wallet was built from the ground up and launched in just 3 months—quickly amassing 25,000 active users and a thriving green community.
Step 1: Background
Scan the QR code to find Carbon Wallet on the App Store or Google Play. Download the app designed by Motherapp and discover its features for yourself. Picture Reference: Carbon Wallet
With global warming and environmental concerns becoming more urgent, companies are under growing pressure to demonstrate social responsibility. To promote low-carbon living, MTR Corporation set out to build an all-in-one wellness lifestyle app that encourages people to reduce their carbon footprint through everyday actions.
The app was designed with a range of eco-friendly missions—such as walking more, taking public transport, recycling, eating vegetarian meals, and using reusable water bottles. Users earn points by completing these tasks and can redeem rewards, creating ongoing motivation to adopt and maintain sustainable habits.
Step 2: Challenges
1. No All-in-One Green Lifestyle App
Most existing apps focus on a single area, such as fitness, recycling, or public transport. However, none offer a seamless experience that brings together all eco-friendly actions in one place. Users often need to switch between multiple apps or manually log their activities, which creates friction and reduces long-term engagement.
The goal was to develop a unified platform that can track a variety of green behaviors and reward users through a centralized and user-friendly system.
2. Fragmented and Complex Eco Missions
Green actions like walking, recycling, taking transit, or shopping sustainably each require different tracking and validation methods. Without seamless integration, the user experience feels disjointed and the feedback loop is unclear.
A single platform was needed to unify tracking, scoring, and reward logic to deliver a consistent user journey.
3. Difficult to Sustain User Engagement
Sustainable living requires long-term commitment, but users often lose motivation if they cannot see the impact of their actions or receive meaningful rewards. Many existing apps fail to clearly show carbon reduction results or offer engaging incentives, leading to a gradual decline in user activity.
To maintain ongoing participation, the solution needed to include an interactive system that instantly visualizes carbon savings, rewards users with points, and offers tangible incentives, helping the user build a sense of achievement and strengthen user loyalty.
4. Complex System Integration
Capturing a wide range of green behaviors required connecting to multiple external systems, such as MTR ride records, recycling machine data, and eco-merchant transaction logs. Each system had its own data structure and verification process, creating significant technical challenges.
The key was to ensure accurate data syncing while keeping the user experience simple and smooth across the entire app.
Step 3: Motherapp Solution
1. All-in-One Green Rewards App to Boost Engagement and Retention
“Green In, Green Out” is the core philosophy behind Carbon Wallet. It encourages users to practice sustainability through everyday actions. The app transforms green behaviors into point-based missions, where users earn CW points by walking, recycling, or riding public transport. These points can then be redeemed for eco-friendly rewards from partners like L’OCCITANE, WWF, Leisurely Veggie, and Eco-Greenergy.
All key features, from carbon reduction tracking and recycling station check-ins to mission challenges, coupon redemption, and push notifications, are integrated into a single, user-friendly app. This streamlined experience not only simplifies user interaction but also drives higher participation, retention, and organic promotion.
2. Seamless System Integration Across Everyday Scenarios
GPS Check-ins (Recycling Stations)
Carbon Wallet provides a map of recycling stations, partner restaurants, and water refill spots. With GPS, it accurately verifies whether users have arrived at the designated location and completed the green missions.
Carbon Wallet uses GPS and photo verification to confirm when users are at designated recycling points and have completed the required actions.
This improves the accuracy of point distribution, eliminates the need for new physical infrastructure, and maximizes operational efficiency by leveraging existing locations.
Octopus Integration (Public Transit)
Carbon Wallet, powered by Motherapp, integrates with Octopus to automatically record users’ MTR travel distance and convert it into points.
Taking the MTR instead of driving is a simple way to reduce carbon emissions. By linking with users’ Octopus accounts, Carbon Wallet automatically tracks public transit usage and rewards users with points—no extra apps or manual input needed. These points can even be redeemed for free rides, reinforcing a positive feedback loop that motivates ongoing participation in low-carbon habits.
Google Fit and Apple Health Integration (Step Tracking)
Carbon Wallet, powered by Motherapp, integrates with Google Fit and Apple Health to automatically sync users’ walking data. This allows users to meet their health goals on Google Fit or Apple Health while simultaneously achieving Carbon Wallet’s low-carbon walking missions, accomplishing both at once.
By connecting with Google Fit and Apple Health, Carbon Wallet automatically syncs users’ daily step data. Once they reach a designated step count, users earn reward points—no need to install additional pedometer apps. This turns simple, everyday walking into a measurable and rewarding green action, making sustainable living easy and accessible.
This integration not only boosts engagement and retention but also helps build a brand image that links wellness with ESG values. Through clear progress tracking and mission-based challenges, users can see the impact of their efforts and develop lasting, healthy habits.
AI label scanner（Recycle）
To simplify the recycling process, Carbon Wallet introduced AI label recognition. Users can simply scan a recycling label on packaging with their phone, and the system instantly identifies the label and provides the correct recycling instructions.
This feature not only improves convenience but also sparks curiosity and learning. Over time, users become more familiar with recycling categories and can develop lasting eco-friendly habits—even without relying on the app.
3. Community Missions to Boost Participation and Engagement
Motherapp developed mission modules with built-in social interaction. Users can join challenges with friends, coworkers, or larger communities—such as “Walk 100,000 steps as a team” or “Complete 400,000 recycling actions together.”
These collaborative missions add fun and a sense of purpose, using group motivation to drive consistent engagement and strengthen platform activity and word-of-mouth growth.
4. Gamified Interface Design to Boost User Stickiness
Motherapp can customize the user interface(UI) to provide a unique experience that aligns with your brand’s style.
The app uses gamification elements such as progress bars, milestone rewards, and level systems to make user interaction more engaging. Each completed mission offers instant feedback and a sense of achievement, encouraging daily use. This approach works especially well for high-frequency but hard-to-sustain behaviors like walking and recycling, helping increase retention and long-term user commitment through fun and visual motivation.
5. Robust Backend for Member Analytics and Precision Marketing
As a specialist in membership systems, Motherapp provides a modular backend that tracks key user metrics in real time—such as mission participation, behavior patterns, and points usage. This allows brands to gain deep insights into user activity and engagement.
These insights support behavioral modeling, which guides reward design, mission adjustments, and product optimization. By segmenting users and tailoring messages based on behavior and membership tier, brands can launch personalized campaigns that improve re-engagement, increase conversion rates, and maximize Customer Lifetime Value (CLV).
Step 4: Results & Impact
1. Launched in 3 Months with 25,000 Active Users and ESG Impact
Designed by Motherapp, Carbon Wallet lets users track their carbon reduction, earn points automatically, and redeem them for coupons — all in one app.
With deep experience in member and loyalty platform, Motherapp applied best practices in rewards, personalization, and user interaction. Motherapp’s modular app architecture enabled rapid and flexible development, allowing Carbon Wallet to launch within three months.
The app quickly reached 25,000 monthly active users and completed 25,000 overall usages, achieving both its ESG targets and early-stage user growth goals.
2. Building a Cross-Brand Green Ecosystem with Strong Partner Loyalty
Carbon Wallet brought together organic restaurants, NGOs, and sustainable brands, creating a platform that connects partners with eco-conscious users. Through gamified missions and a shared points system, partner brands were able to deliver their sustainability message and raise visibility among their target audiences.
Unlike traditional loyalty apps, Carbon Wallet attracted users who actively support ESG causes. This enabled sustainable brands to reach high-retention users at lower cost, improving conversion and strengthening long-term partner loyalty through values-based engagement.
3. Building Long-Term ESG Brand Value
Carbon Wallet is more than a marketing systems. It helps brands cultivate long-term ESG brand equity. By encouraging users to complete green actions and stay engaged over time, the app generates real carbon reduction data and behavioral insights.
As users share and refer others, brands benefit from organic growth and community-driven impact that is more sustainable than short-term ad campaigns.
4. Unlocking High-Value Member Data for Targeted Growth
Unlike traditional loyalty programs that focus on transactions, wellness lifestyle apps capture richer users’ behavioral data across walking, health challenges, and mission participation. This enables brands to better understand user habits, preferences, and motivations.
With this insight, brands can build precise member segments, launch personalized rewards, and trigger time-based or behavior-driven campaigns. These behavioral data assets are valuable not only for marketing but also for product planning and long-term membership strategy—supporting sustainable, competitive growth.
Conclusion
Carbon Wallet, powered by Motherapp, is Hong Kong’s first all-in-one platform that rewards walking, recycling, green transit, and sustainable shopping.
Through seamless integrations with GPS, Octopus, Google Fit, and Apple Health, it turns daily actions into a digital ESG movement.
If you’re planning to build a wellness lifestyle app with loyalty, user engagement, and real ESG value, Motherapp has the tools, experience, and platform to bring it to life and fast.
Click to get a consultation and quote.
Carbon Wallet: 忠誠計劃平台的另類應用
想打造一個結合永續、健康與會員獎賞的 App？
本案例深入解析由 Motherapp 協助開發的【Carbon Wallet】，如何透過一站式綠色生活 App，結合 GPS、八達通、Google Fit、AI 辨識等技術，成功將日常步行、回收、搭港鐵等行為轉化為積分任務與 ESG 回饋。
您將在這份案例中看見：
- 開發這類 Wellness Lifestyle App 有什麼實際商業效益？
- 如何設計任務與獎賞，提升用戶參與度與回訪率？
- 有哪些技術可以整合，讓用戶體驗順暢又有黏性？
- Wellness Lifestyle App 如何支援 ESG 目標，並創造品牌差異化？
本文將帶你一步步了解 Carbon Wallet 的設計邏輯、系統整合方法，以及它如何在短短三個月內成功上線、建立超過 25,000 名活躍用戶的綠色社群。
第一步. 個案背景
掃描 QR Code，即可前往 App Store 或 Google Play 下載，由 Motherapp 設計的 Carbon Wallet，馬上體驗 App 功能。
隨着全球暖化及各類生態環境問題日益嚴峻，企業積極展現社會責任已成為不可忽視的趨勢。港鐵為了推動環保與減碳生活，計劃設計一個一站式綠色生活應用程式，鼓勵市民以日常行動減少碳排放。
應用程式設計了多元化任務，例如多步行、搭乘公共交通、資源回收、進食素食，以及自備水壺減少使用即棄塑膠。市民完成指定任務後，可獲取相應點數並兌換獎勵，進一步激勵用戶在日常生活中持續實踐低碳行動。
第二步. 個案挑戰
1. 缺乏一站式綠色生活 App
市場上雖然不乏健康或環保類型的應用程式，但大部分只針對單一功能，缺少能夠整合多種綠色生活場景的一站式平台。市民想要透過環保行動換取獎勵，往往要安裝多個程式或手動記錄相關數據，過程繁瑣不便，降低了長期使用的意欲。因此，打造一個能夠整合多種綠色行為、並統一積分及獎賞管理的 App，是品牌希望達成的目標。
2. 綠色任務種類繁多且分散
綠色行為涉及多種場景，例如步行、回收、搭港鐵、蔬食飲食、等，每一種行為都需要不同的紀錄方式及驗證標準。若未能將這些任務整合於同一平台，無法為用戶帶來一致的體驗和明確的回饋。品牌需要一個能夠無縫整合這些任務，並將積分統一計算和顯示的解決方案，令用戶能夠在單一平台上掌握所有綠色成就。
3. 用戶活躍度難以維持
綠色生活講求長期堅持，但如果用戶無法感受到自己對環境的貢獻或看不到具體回報，很容易失去參與的動力。很多現有應用程式未能清晰展示用戶的減碳成果，或缺乏具吸引力的獎賞機制，導致活躍度逐漸下降。要保持用戶長期參與，需要一個能即時顯示減碳量、回饋積分及實質獎賞的互動系統，提升用戶的成就感與黏性。
4. 跨系統整合難度高
要全面記錄不同類型的綠色行為，需要同時對接多個外部系統，例如港鐵乘車紀錄、回收機數據、環保商戶的交易資料等，技術挑戰非常大。每個系統的數據結構和驗證流程各不相同，整合過程不但要確保資料傳輸準確可靠，還必須讓操作介面保持簡單直觀，避免複雜步驟影響用戶體驗。如何 在高效整合多系統的同時，維持流暢且易用的使用流程，是此專案的一大關鍵難題。
第三步. Motherapp 解決方案
1. 一站式易用綠色獎賞 APP，提升參與率與回訪率
“Green In, Green Out.” 是 Carbon Wallet 所倡導的綠色生活理念，鼓勵市民在日常生活中，從大小事實踐環保。作為一個任務導向的獎賞平台，Carbon Wallet 透過設計各式各樣的綠色生活任務，讓用戶在完成行動後獲得 CW 積分，實現 “Green In”；而 “Green Out” 則體現在 CW 積分可兌換來自 L’OCCITANE 、WWF、Leisurely Veggie、Eco-Greenergy 等合作夥伴所提供的環保獎勵。
從每日步行累積的碳排放減量、回收站查詢、任務挑戰、優惠券兌換，到廣告推播等功能，全數整合於一個 App 中。這不僅簡化了使用流程，也提升了用戶參與度與整體體驗，讓用戶更樂於持續參與、回訪與推廣。
2. 跨系統整合，覆蓋用戶生活多個場景
GPS 定位（回收站點）
Carbon Wallet 提供回收站、特約餐廳與斟水地點的地圖功能，透過 GPS 定位技術，精準判斷用戶是否抵達指定地點並完成任務。
Carbon Wallet 結合 GPS 定位與相片認證技術，能準確判定用戶是否位於指定回收點並完成指定動作。這不僅提高點數派發的準確性，也避免設立額外回收設施所需的高昂成本，善用現有資源，提升運營效率。
八達通串接（搭乘港鐵）
搭乘港鐵而非自駕，是實踐低碳生活的日常選擇之一。Carbon Wallet 串接八達通帳戶，讓用戶在搭乘港鐵時自動記錄通勤里程並獲得積分獎勵，無需額外操作或下載其他應用程式，日常通勤即可完成任務，降低參與門檻。所累積的積分更可兌換免費車程，讓綠色行為創造正向循環，進一步提升用戶持續參與的動力。
Motherapp 設計將 Carbon Wallet 與八達通串接，App 可自動記錄用戶乘搭港鐵的里數，並轉換為積分獎勵。
與 Google Fit 及 Apple Health 整合（行路紀錄）
透過與 Google Fit 及 Apple Health 整合，用戶的每日步行數據可自動同步至 App，完成指定步數任務即可獲得積分獎勵。無需另行安裝其他紀步工具，用戶下載 Carbon Wallet 後即可即時開始記錄，將日常步行這類低門檻的綠色行為轉化為有意義的可視成果，令實踐可持續生活變得簡單直接。
這不僅提升了用戶參與度和持續使用意願，亦有助品牌建立健康與 ESG 相連結的形象。透過系統化紀錄與任務挑戰，用戶可清楚見到自己的努力與貢獻，從中獲得成就感，進一步培養良好生活習慣。
AI 智能回收標籤辨識功能（環保回收）
為了減少用戶在查找回收資訊上的繁瑣操作，App 導入了 AI 智能回收標籤辨識技術。用戶只需以手機鏡頭掃描包裝上的回收標籤，系統便能即時透過 AI 影像辨識技術，自動辨識標籤內容並提供正確的回收指引，大幅提升使用便利性。
這項創新功能不僅讓用家回收分類變得更簡單，亦能激發用戶的好奇心與學習興趣。隨著使用次數增加，用戶會逐漸建立對不同回收標籤的認識，即使日後沒有 App 協助，亦能養成正確的分類回收習慣，真正實踐日常環保。
3. 社群任務（Community Mission），提升互動與參與度
Motherapp 設計了具備社群互動元素的任務模組，用戶可以與朋友、同事或社群一起參與挑戰，例如「全公司一週共走十萬步」、「與好友一起完成 400000 次回收任務」。這不僅增加了任務的趣味性與目標感，也透過群體動力促進用戶持續參與，強化平台的活躍度與口碑擴散力。
4. 遊戲化介面設計，增強用戶黏性
Motherapp 可為客製化介面設計，讓用家體驗及視覺風格符合品牌形象。
App 採用遊戲化設計手法，包括進度條、階段獎勵、等級制度等互動元素，用戶在完成每個任務時都能獲得即時回饋與成就感，強化每日使用動機。這類設計特別適合日常頻率高但難以持續的行為（如走路、回收），透過視覺化激勵與趣味體驗，大幅提升留存率與用戶黏性。
5. 完善後台系統，支援會員數據分析與精準行銷
作為專注於會員系統開發的團隊，Motherapp 擁有一套完整且模組化的會員數據後台架構，可即時追蹤用戶的任務參與狀況、行為偏好、積分使用路徑等關鍵指標，協助品牌全面掌握會員互動與活躍度。
這些數據不僅能即時提供用戶洞察（member insights），更可用於建立會員行為模型，為品牌後續的獎賞設計、任務調整與產品優化提供依據。
透過進一步的行為分群與層級分類，品牌能推動個人化推播與動態行銷，制定更貼近用戶需求的獎賞策略與活動節奏，有效提升再行銷效率、提高轉換率，並強化顧客終身價值（Customer Lifetime Value, CLV）。
第四步. 最終成果與效益
1. 3 個月快速上線 APP，達成 25,000 活躍用戶並實現 ESG 成效
由 Motherapp 設計的 Carbon Wallet，讓用家可以一站式記錄減碳行為，自動賺取積分，並於同一個 App 內換領多間商戶的優惠券。
Motherapp 多年在會員系統與忠誠計劃（Loyalty Program）設計的經驗，我們知道積分回饋、個人化獎賞及互動任務設計的最佳實踐方法。同時，Motherapp 的 App 設計架構具備高度模組化，能讓開發過程更快捷靈活。因此，Carbon Wallet 能在 3 個月內成功上線，並於初期就達到 25,000 月活躍用戶（MAU）和 25,000 次總使用量，迅速實現了客戶專案預期的 ESG 成效及推廣目標。
2. 打造跨品牌綠色生態圈，擴大聯盟行銷影響力
Carbon Wallet 成功串聯有機餐廳、非政府組織與環保品牌，成為他們與目標顧客之間的溝通與互動橋樑。透過任務設計與積分兌換機制，合作品牌不僅能更有效傳遞其綠色產品與永續理念，亦能在核心受眾中提升品牌能見度。
不同於傳統以消費為導向的 Loyalty App，Carbon Wallet 的用戶對 ESG 議題具有高度認同與參與意願，使品牌得以以更低的推廣成本，觸及黏著度更高的目標族群。這種「對準受眾」的策略，能有效提升曝光的轉換效率，進一步帶動實際購買行為。
3. 建立長期 ESG 品牌形象，實現持續商業回報
Carbon Wallet 不只是一個行銷工具，更協助品牌建立長期的 ESG 形象資產。透過鼓勵大眾自發參與綠色任務及持續使用 App，品牌不單獲得實際減碳數據與行為回饋，更有機會透過用戶口碑與推薦（referral）擴散影響力。這種來自用戶主動參與的長尾效應，遠比一次性的新聞曝光或廣告活動更具商業價值與永續性。
4. 掌握高價值會員數據，推動精準行銷與多元應用
傳統會員計劃多以消費紀錄為主，但在數碼化時代，用戶的日常行為數據反而更能反映真實需求與參與度。透過 Wellness Lifestyle App，品牌可掌握會員在運動、健康挑戰、任務參與等方面的互動行為，從而了解每位用戶的生活習慣、興趣及偏好。
這些豐富的數據有助建立更精準的會員分層，並支援個人化的行銷策略，例如：為不同用戶群設計專屬獎賞路徑，或推出根據行為觸發的限時活動。
這些行為數據本身是品牌極具價值的長期資產。不僅能應用於精準行銷，更能在產品設計與策略決策上發揮關鍵影響，協助企業建立更具永續性與競爭力的會員經營模式。
結語
Motherapp 協助 Carbon Wallet 開發的 Wellness Lifestyle App，打造出全港首個結合步行、回收、綠色交通與綠色消費任務的一站式平台。透過 GPS、八達通、Google Fit、Apple Health 等系統整合，App 能夠精準讀取並連接市民日常生活中的各項綠色行為，成功將 ESG 理念落實在數碼日常中。
如果你的品牌正考慮開發具備獎賞機制、用戶互動性高、可支援 ESG 的健康生活應用程式，Motherapp 擁有完善的產品架構、豐富的開發經驗，以及整合會員系統與數據分析的能力，能夠為你快速打造具實際商業效益的 Wellness Lifestyle App。
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