# Valuday vs Erosion 蚀

The clearest difference is in-app purchases: Erosion 蚀 at none against Valuday's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Valuday sells 3 in-app purchases, starting at $0.99 per month. Erosion 蚀 asks for nothing beyond the download.

Valuday ships an update weekly, Erosion 蚀 fortnightly. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Valuday | Erosion 蚀 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Size | 5 MB | 1 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [伟杰 袁](https://appshunter.io/developer/1886591039) | [名哲 张](https://appshunter.io/developer/1879661087) |

## What reviewers say

### Valuday

[App page](https://appshunter.io/ios/app/valuday-cost-per-use/id6760961479)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Valuday Pro Monthly | $0.99 | per month |
| Valuday Pro Yearly | $5.95 | per year |
| Valuday Pro Lifetime | $14.90 | one-time |


### Erosion 蚀

[App page](https://appshunter.io/ios/app/erosion/id6761682068)

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

**In-app purchases:** none


## Frequently asked questions

### Is Valuday free?

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

### Is Erosion 蚀 free?

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

### Do Valuday or Erosion 蚀 have ads?

Neither Valuday nor Erosion 蚀 shows ads.

### Which is updated more often, Valuday or Erosion 蚀?

Valuday ships an update weekly, and Erosion 蚀 fortnightly. Most recently, Valuday was updated on October 31, 2026 and Erosion 蚀 on November 9, 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.*