# Simple Days Until vs SuiSui

The clearest difference is in-app purchases: Simple Days Until at none against SuiSui's 1. SuiSui's advantage is update cadence (every 2 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SuiSui sells 1 one-off in-app purchase. Simple Days Until asks for nothing beyond the download.

Simple Days Until ships an update weekly, SuiSui every 2 days. The most recent releases landed on September 9, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | Simple Days Until | SuiSui |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Size | 12 MB | 2 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [naoya takamura](https://appshunter.io/developer/1788186935) | [Lihai La LLC](https://appshunter.io/developer/1831311728) |

## What reviewers say

### Simple Days Until

[App page](https://appshunter.io/ios/app/simple-days-until/id6744551057)

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

**In-app purchases:** none


### SuiSui

[App page](https://appshunter.io/ios/app/suisui-countdown-and-days/id6789145503)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 岁岁 - 倒数日与纪念日 | $2.99 | one-time |


## Frequently asked questions

### Is Simple Days Until free?

Simple Days Until is free to download, with no in-app purchases.

### Is SuiSui free?

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

### Do Simple Days Until or SuiSui have ads?

Neither Simple Days Until nor SuiSui shows ads.

### Which is updated more often, Simple Days Until or SuiSui?

Simple Days Until ships an update weekly, and SuiSui every 2 days. Most recently, Simple Days Until was updated on September 9, 2026 and SuiSui on August 29, 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.*