# ThinkOnTheFly vs 观己 · Becoming

The clearest difference is update cadence: 观己 · Becoming at daily against ThinkOnTheFly's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ThinkOnTheFly sells 3 in-app purchases, starting at $0.99 per month and 观己 · Becoming sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ThinkOnTheFly ships an update fortnightly, 观己 · Becoming daily. The most recent releases landed on October 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ThinkOnTheFly | 观己 · Becoming |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Size | 10 MB | 3 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [家贺 万](https://appshunter.io/developer/1820076368) | [世明 梁](https://appshunter.io/developer/1896738261) |

## 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 |


### 观己 · Becoming

[App page](https://appshunter.io/ios/app/becoming/id6770409043)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 早鸟支持 | $3.99 | one-time |
| 终身归处 | $12.99 | one-time |


## Frequently asked questions

### Is ThinkOnTheFly free?

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

### Is 观己 · Becoming free?

观己 · Becoming is free to download, with in-app purchases available.

### Do ThinkOnTheFly or 观己 · Becoming have ads?

Neither ThinkOnTheFly nor 观己 · Becoming shows ads.

### Which is updated more often, ThinkOnTheFly or 观己 · Becoming?

ThinkOnTheFly ships an update fortnightly, and 观己 · Becoming daily. Most recently, ThinkOnTheFly was updated on October 28, 2026 and 观己 · Becoming on October 6, 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.*