# Flashduty vs OneDayAgain

The clearest difference is in-app purchases: Flashduty at none against OneDayAgain's 2. Flashduty also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.6). OneDayAgain's advantage is update cadence (weekly vs every 4 months). On price and ads there is nothing between them.

Both are free to download. OneDayAgain sells 2 in-app purchases, starting at $0.99 per year. Flashduty asks for nothing beyond the download.

Flashduty ships an update every 4 months, OneDayAgain weekly. The most recent releases landed on September 27, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Flashduty | OneDayAgain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 43 MB | 4 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Flashcat Cloud Technology Co.,Ltd.](https://appshunter.io/developer/1762798179) | [善康 梁](https://appshunter.io/developer/1835924366) |

## What reviewers say

### Flashduty

[App page](https://appshunter.io/ios/app/flashduty/id6636480851)

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

**In-app purchases:** none


### OneDayAgain

[App page](https://appshunter.io/ios/app/onedayagain/id6751766604)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium-$3.99/yr (Auto-Renews) | $0.99 | per year |
| Lifetime Premium | $1.99 | one-time |


## Frequently asked questions

### Is Flashduty free?

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

### Is OneDayAgain free?

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

### Do Flashduty or OneDayAgain have ads?

Neither Flashduty nor OneDayAgain shows ads.

### Which is updated more often, Flashduty or OneDayAgain?

Flashduty ships an update every 4 months, and OneDayAgain weekly. Most recently, Flashduty was updated on September 27, 2026 and OneDayAgain on October 11, 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.*