ThinkOnTheFly vs TradeFlex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThinkOnTheFly
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Capture every spark in your mind instantly, keep fleeting inspiration, to-do items, and creative ideas forever, and say goodbye to the trouble of forgetting. With minimalist design and efficient operation process, whether you have sudden inspiration on your commute, important ideas flashing in a meeting, or a burst of wonderful ideas in your mind late at night, you can complete the record in a few seconds. Powerful classification tags and intelligent search functions allow you to easily manage massive content, quickly locate the required information at any time, and make fragmented records orderly. Whether you are a student, a professional, a creator, or you who love life and think hard, [Random Memo] is your exclusive memory butler and inspiration treasure house * "Random Memo" attaches great importance to the security of everyone's data privacy. Because of this, "Random Memo" has not developed a server, and all data is stored locally. Therefore, developers will never be able to access everyone's data. *Membership subscription: Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period; the account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user, and auto-renewal may be turned off by going to the user's AppStore Account Settings after purchase. [Feedback] If you have any questions about the product, please send an email to: longlong13578@icloud.com Privacy Policy: https://outgoing-cheese-e3b.notion.site/Privacy-Policy-213b209c98f98048b034cec91156c24e Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
TradeFlex
This app is a professional trading journal and portfolio management tool. It allows users to record, organize, and analyze trades across various markets and currencies. Features include custom fee rules, dividend tracking, and cash flow management, all stored locally for privacy.
- Multiple independent portfolios
- Fast trade logging with automatic calculations
- Customizable commission models
- Dividend and cost basis tracking
- Support for complex trades and short selling
- Strategy tagging and P/L analysis
- Local data storage for privacy
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Trade Flex — A Flexible Trading Journal and Portfolio Management Tool Trade Flex is a professional trade journal designed for investors and traders. It helps you record and organize trades across markets and currencies, giving you full clarity over your portfolios. Key Features Multiple Portfolios: Manage stocks, crypto, funds, and more with independent portfolios. Fast Input System: Log a trade in seconds — calculations are handled automatically. Flexible Fee Rules: Create custom commission models to reflect real costs. Dividends & Cost Basis: Record dividends and calculate diluted average prices automatically. Swaps & Complex Trades: Handle exchanges, swaps, and position changes with ease — perfect for crypto. Short Selling & Sub-Positions: Track short trades and create sub-positions for the same symbol. Strategy Tags: Tag trades and analyze results to validate strategies. Profit & Loss Analysis: Review P/L by time range or closed positions for quick evaluation. Cash Flow Management: Track deposits and withdrawals in multiple currencies, always know your cash position. Custom Assets: Add and update any asset, even those not listed on exchanges. Linked Data Updates: Edit any historical trade — subsequent records are adjusted automatically. Privacy First: All data is stored locally on your device. No accounts, no cloud, full control of your privacy. Additional Features Customizable themes with light & dark mode Supports multiple languages for global users Multiple charts and analytics to review your trading performance No ads — focused on a clean and distraction-free experience Trade Flex empowers you to record and manage trades with full flexibility — whether you’re a professional trader or an individual investor. 【Automatic Renewal Premium Membership Service: TradeFlex PRO】 Unlock the full potential of TradeFlex with the PRO membership: • Multi-portfolio management • Multiple Positions • Unlimited Transactions • Real-time Price Update • Choose multiple color themes Subscription Information: • Length: Monthly or Annual • Price: Displayed in-app before purchase • Payment will be charged to your Apple ID account at the confirmation of purchase. • Subscription automatically renews unless canceled at least 24 hours before the end of the current period. • You can manage or cancel your subscription anytime in your App Store account settings after purchase. • Privacy Policy: https://docs.tradeflex.app/privacy.html • Terms of Use: https://docs.tradeflex.app/terms.html
Screenshots
Verdict
The clearest difference is update cadence: TradeFlex at every 2 days against ThinkOnTheFly's fortnightly. TradeFlex also leads on device support (4 vs 2) and iOS requirement (13.0 vs 17.6). On price, ads and in-app purchases 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
Both are free to download. ThinkOnTheFly sells 3 in-app purchases, starting at $0.99 per month and TradeFlex sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
ThinkOnTheFly ships an update fortnightly, TradeFlex every 2 days. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.
| Parameter | ThinkOnTheFly | TradeFlex |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | 家贺 万 | ZONGKUN YU |
In-app purchases
ThinkOnTheFly
- Monthly Plan7 Days trial$0.991 Month
- Annual Plan$2.991 Year
- Lifetime Access$5.99
TradeFlex
- Monthly$1.991 Month
- Annual$19.991 Year
- Lifetime$34.99









