# Hidden Notes vs Flow City

Hidden Notes and Flow City are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Hidden Notes sells 10 one-off in-app purchases and Flow City sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Hidden Notes | Flow City |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | — | Every 3 days |
| Size | 258 MB | 92 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Hiker Games Joint Stock Company](https://appshunter.io/developer/492037747) | [CoachOn Inc.](https://appshunter.io/developer/1830375522) |

## What reviewers say

### Hidden Notes

[App page](https://appshunter.io/ios/app/hidden-notes-logic-puzzle/id6811024780)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1000 | $1.99 | one-time |
| Continue Offer 1 | $2.99 | one-time |
| Continue Offer 2 | $5.99 | one-time |
| 5000 | $7.99 | one-time |
| No Ads | $7.99 | one-time |
| No Ads Plus | $12.99 | one-time |
| 10000 | $14.99 | one-time |
| 25000 | $29.99 | one-time |
| 50000 | $49.99 | one-time |
| 100000 | $89.99 | one-time |


### Flow City

[App page](https://appshunter.io/ios/app/flow-city-sort-and-build/id6811847266)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Coins | $1.99 | one-time |
| 3 Blueprints | $1.99 | one-time |
| Starter Pack | $2.99 | one-time |
| Premium Decor Set | $3.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Bag of Coins | $4.99 | one-time |
| 10 Blueprints | $4.99 | one-time |
| Booster Bundle | $6.99 | one-time |
| Chest of Coins | $9.99 | one-time |
| Mega Bundle | $19.99 | one-time |


## Frequently asked questions

### Is Hidden Notes free?

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

### Is Flow City free?

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

### Do Hidden Notes or Flow City have ads?

Both Hidden Notes and Flow City show ads.

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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.*