# 시소 vs echo

The clearest difference is update cadence: 시소 at every 2 weeks against echo's every 6 weeks. 시소 also leads on iOS requirement (16.0 vs 18.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 시소 sells 5 one-off in-app purchases and echo sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

시소 ships an update every 2 weeks, echo every 6 weeks. The most recent releases landed on September 23, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 시소 | echo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Size | 46 MB | 5 MB |
| Requires iOS | **16.0** | 18.4 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [PLION Corp.](https://appshunter.io/developer/377841185) | [Studio5](https://appshunter.io/developer/1749971435) |

## What reviewers say

### 시소

[App page](https://appshunter.io/ios/app/50-plus/id6744629309)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 시소 딱지 18개 충전 | $2.99 | one-time |
| 시소 딱지 35개 충전 | $4.99 | one-time |
| 시소 딱지 70개 충전 | $9.99 | one-time |
| 시소 딱지 175개 충전 | $29.99 | one-time |
| 시소 딱지 350개 충전 | $49.99 | one-time |


### echo

[App page](https://appshunter.io/ios/app/echo/id6755811431)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo 프리미엄 (월간) | $2.99 | per month |
| Echo 프리미엄 (연간) | $29.99 | per year |
| Echo 프리미엄 (평생) | $59.99 | one-time |


## Frequently asked questions

### Is 시소 free?

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

### Is echo free?

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

### Do 시소 or echo have ads?

Neither 시소 nor echo shows ads.

### Which is updated more often, 시소 or echo?

시소 ships an update every 2 weeks, and echo every 6 weeks. Most recently, 시소 was updated on September 23, 2026 and echo 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.*