# ReminderOS vs Flow

The clearest difference is in-app purchases: Flow at none against ReminderOS's 3. Flow also leads on iOS requirement (17.0 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ReminderOS sells 3 in-app purchases, starting at $0.49 per 7 days. Flow asks for nothing beyond the download.

ReminderOS ships an update every 3 days, Flow every 4 days. The most recent releases landed on September 14, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ReminderOS | Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Size | 26 MB | 7 MB |
| Requires iOS | 26.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Paul Waweru](https://appshunter.io/developer/1715153836) | [LE TRI THUC](https://appshunter.io/developer/1889002929) |

## What reviewers say

### ReminderOS

[App page](https://appshunter.io/ios/app/reminderos-smart-reminders/id6758914560)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReminderOS Pro | $0.49 | per 7 days |
| ReminderOS Pro | $19.99 | per year |
| ReminderOS Lifetime | $49.99 | one-time |


### Flow

[App page](https://appshunter.io/ios/app/flow-activities-and-notes/id6761343530)

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

**In-app purchases:** none


## Frequently asked questions

### Is ReminderOS free?

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

### Is Flow free?

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

### Do ReminderOS or Flow have ads?

Neither ReminderOS nor Flow shows ads.

### Which is updated more often, ReminderOS or Flow?

ReminderOS ships an update every 3 days, and Flow every 4 days. Most recently, ReminderOS was updated on September 14, 2026 and Flow on September 15, 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.*