GainDay
Multi-Market Portfolio Tracker
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
2.0 is here: AI analyst online, NISA historical FX snapshot, full JFSA 2,260-fund catalog. Apple Sign-In + cloud AI for global multi-account investors.
Gainday is a multi-account, multi-market investment tracker built for investors in Japan, China, and globally.
■ One app, five markets
Japanese stocks, US stocks, China A-shares, Hong Kong stocks, Japanese mutual funds (NISA), and crypto — managed in a single view, auto-converted to your base currency. Stop juggling SBI, Rakuten, Futu, Snowball, Robinhood, and Yahoo Finance.
■ NISA done right (Japan users)
• Full JFSA NISA catalog: 2,260 unlisted funds, 318 Tsumitate-eligible
• Real-time quota consumption: ¥1.2M Tsumitate + ¥2.4M Growth annual + ¥18M lifetime bar
• Foreign-currency buys lock in trade-date FX so lifetime quota doesn't drift with yen moves
• Per-10,000-unit pricing accurate for Japanese mutual funds
■ AI private analyst (Pro / Pro+)
Ask about portfolio performance, what moved today, risk concentration. AI grounds its answers in your position weights + live market data + multilingual news. Pro uses DeepSeek; Pro+ unlocks Anthropic Claude top-tier model. Strict privacy: weights only — never amounts or trades.
■ Privacy by design
• Core data (holdings, transactions) never leaves your iPhone
• Anonymized weight summary uploads only when you explicitly enable AI
• Data stored in our Tokyo region
■ Core features
• P&L calendar with monthly heatmap + yearly curve
• Multi-account, multi-currency consolidation
• Dynamic Island live price alerts
• Monthly & yearly share cards
• CSV import/export (SBI, Rakuten, Futu, Snowball, Robinhood)
• Full localization: zh-Hans, zh-Hant, en, ja
■ Subscription
• Free: forever, all core features
• Pro: $3.99/mo · $29.99/yr
• Pro+: $6.99/mo · $59.99/yr
Payment via Apple ID; subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in iOS Settings → Apple ID → Subscriptions.
Terms of Use (EULA): https://www.gainday.app/terms
Privacy Policy: https://www.gainday.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Gainday 2.0 — our biggest update yet:
• AI chat analyst (Pro / Pro+): insights grounded in your portfolio, never your balances
• NISA, fully upgraded: 2,260 JFSA-approved funds; foreign-currency buys lock in trade-date FX
• Holdings redesigned: Today / This Month / All-time, with sort, pin & archive
• Ticker nicknames: call AAPL "my Apple" and it flows everywhere
• Dynamic Island live price alerts
• Apple Sign-In + cloud AI live in our Tokyo region
Thanks for using Gainday. A rating helps us enormously
The developer, DANA AINIWAER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DANA AINIWAER
- Size
- 92.7 MB
- Category
- Finance
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 3 more
- English, Japanese, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Gainday Pro+ Annual $89.99
- Gainday Pro+ Monthly $7.99
- Gainday Pro Annual $39.99
- Gainday Pro Monthly $3.99
- Copyright
- © 2026 DANA AINIWAER
