# 暗礁助手 vs LitDay

The clearest difference is review sentiment: LitDay at 100% against 暗礁助手's 43%. LitDay also leads on in-app purchases (none vs 3) and update cadence (every 5 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. 暗礁助手 sells 3 in-app purchases, starting at $0.99 per month. LitDay asks for nothing beyond the download.

暗礁助手 ships an update monthly, LitDay every 5 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 暗礁助手 | LitDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6496372036/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | — | Free |
| Size | 28 MB | 14 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [浩源 陈](https://appshunter.io/developer/1665506236) | [广悦 谢](https://appshunter.io/developer/1895409762) |

## What reviewers say

### 暗礁助手

[App page](https://appshunter.io/ios/app/id6496372036)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 暗礁助手 Pro | $0.99 | per month |
| 暗礁助手 Max | $0.99 | per month |
| 暗礁助手 Ultra | $2.99 | per month |


### LitDay

[App page](https://appshunter.io/ios/app/litday-countdowncounterdays/id6781392421)

Track important dates with custom backgrounds and recurring reminders. View time spans in years, months, weeks, and days, and add tags and notes for better organization. Supports lunar calendar display.

**Highlights:** Customizable card backgrounds (images, videos, Live Photos), Monthly and yearly recurring event tracking, Detailed time span breakdown (years, months, weeks, days), Tagging and note-taking for events, Day-of-week and lunar calendar display options

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

**In-app purchases:** none


## Frequently asked questions

### Is 暗礁助手 free?

暗礁助手 is free to download, with in-app purchases available.

### Is LitDay free?

LitDay is free to download, with no in-app purchases.

### Do 暗礁助手 or LitDay have ads?

Neither 暗礁助手 nor LitDay shows ads.

### Which is updated more often, 暗礁助手 or LitDay?

暗礁助手 ships an update monthly, and LitDay every 5 days. Most recently, 暗礁助手 was updated on November 4, 2026 and LitDay on October 31, 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.*