# ThinkOnTheFly vs TradeFlex

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.

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.

## The numbers

| Metric | ThinkOnTheFly | TradeFlex |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 10 MB | 33 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [家贺 万](https://appshunter.io/developer/1820076368) | [ZONGKUN YU](https://appshunter.io/developer/1836392911) |

## What reviewers say

### ThinkOnTheFly

[App page](https://appshunter.io/ios/app/thinkonthefly/id6747250744)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| Annual Plan | $2.99 | per year |
| Lifetime Access | $5.99 | one-time |


### TradeFlex

[App page](https://appshunter.io/ios/app/tradeflex/id6751715293)

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.

**Highlights:** 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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $19.99 | per year |
| Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is ThinkOnTheFly free?

ThinkOnTheFly is free to download, with in-app purchases available.

### Is TradeFlex free?

TradeFlex is free to download, with in-app purchases available.

### Do ThinkOnTheFly or TradeFlex have ads?

Neither ThinkOnTheFly nor TradeFlex shows ads.

### Which is updated more often, ThinkOnTheFly or TradeFlex?

ThinkOnTheFly ships an update fortnightly, and TradeFlex every 2 days. Most recently, ThinkOnTheFly was updated on October 18, 2026 and TradeFlex on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*