マメタス おつりで資産運用 by WealthNavi

Content rating
Everyone
10K+
Downloads
Content rating
Everyone
Learn more
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About this app

Your usual cafe visits, online shopping, and change from your purchases are invested!
This is a noteworthy app that has been featured on NHK's "Ohayo Nippon" and TV Tokyo's "WBS."

▼ Recommended for:
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* People in their 20s and 30s who are interested in asset management
* People who are interested in asset management but don't know who to consult
* People who want to manage their assets for the future but lack investment knowledge

▼ Main features of Mametasu
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* The "change" from your daily credit card purchases is invested by a robo-advisor.
* You can choose the amount of "change" to invest in fractional amounts of 100 yen, 500 yen, or 1000 yen.
* Once a month, your accumulated "change" is automatically deducted from your bank account and invested.
* Asset management is handled by the robo-advisor "WealthNavi".
▼ Features of the robo-advisor "WealthNavi" that handles the investment
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1. Fully Hands-Off Asset Management
Based on Nobel Prize-winning theories and other asset management algorithms, and utilizing cutting-edge functions, it automatically performs internationally diversified investment without requiring advanced knowledge or effort.

2. Service for those who want to build assets stably over the medium to long term
The robo-advisor creates an optimal portfolio, enabling rational investment behavior such as maintaining appropriate asset allocation and continuing regular investments without being hindered by the psychological barriers that individual investors often fall into.

3. High Functionality Supports Effective and Efficient Investment
The "Automatic Investment with Rebalancing Function" and "Automatic Tax Optimization ("DeTAX")" functions, for which core technologies are patented, support your efficient and effective investment. *Please note that there are conditions for applying automatic tax optimization ("DeTAX"), and it does not guarantee that tax burdens will always be deferred.

▼ Security
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* Your personal information is encrypted and strictly managed and operated.

▼ Inquiries
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* Inquiries to our company are accepted via the internet through the inquiry form.
* https://www.wealthnavi.com/support

▼ Important Notes
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* Please check our website for risks and fees related to transactions of financial products, etc.

* https://www.wealthnavi.com/rule/01.html

▼ Operating Company
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* WealthNavi Co., Ltd.
* Financial Instruments Business Operator, Kanto Local Finance Bureau Director (Financial Instruments) No. 2884
* Member Associations: Japan Securities Dealers Association, Japan Asset Management Association
* https://www.wealthnavi.com
Updated on
May 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Financial info and 3 others
Data is encrypted in transit
You can request that data be deleted

What’s new

マメタスをご利用いただきありがとうございます。
アップデート内容は以下の通りです。
・軽微な修正を行いました
Content rating
Everyone
Learn more

App support

About the developer
WEALTHNAVI INC.
team_mobile-app-development_all@wealthnavi.com
8-4-13, NISHIGOTANDA GOTANDA JP BLDG. 9F. SHINAGAWA-KU, 東京都 141-0031 Japan
+81 70-4480-0065