# FlowDown vs OpenSub

The clearest difference is in-app purchases: FlowDown at none against OpenSub's 2. FlowDown also leads on update cadence (every 4 days vs every 2 weeks) and ratings volume (29 vs 2). OpenSub's advantage is review sentiment (100% vs 75%) and rating (4.5 vs 4.3). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OpenSub sells 2 in-app purchases, starting at $9.99 per year. FlowDown asks for nothing beyond the download.

OpenSub holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: FlowDown has 29 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 75% of FlowDown's written reviews are positive against 100% of OpenSub's.

FlowDown ships an update every 4 days, OpenSub every 2 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | FlowDown | OpenSub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (29 ratings)](https://appshunter.io/ios/app/flowdown-open-and-fast-ai/id6740553198/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/opensub-subscription-tracker/id6762130793/reviews)** |
| Number of ratings | **29** | 2 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Paid | **Freemium** |
| Size | 124 MB | 16 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [子衎 王](https://appshunter.io/developer/1710838888) | [Shanghai Haishi Culture Technology Co., Ltd.](https://appshunter.io/developer/1893052687) |

## What reviewers say

### FlowDown

[App page](https://appshunter.io/ios/app/flowdown-open-and-fast-ai/id6740553198)

This AI chat app offers a fast, focused, and controlled experience for working with large language models. It supports rich Markdown formatting, connects to various OpenAI-compatible APIs, and allows input via text, images, and audio. Enjoy smooth conversations and automatic chat titles for better organization.

**Highlights:** Fast and efficient AI chat, Rich Markdown rendering, Connects to OpenAI-compatible APIs, Supports text, image, and audio input, Automatic chat titles, Shortcut integrations, Privacy-focused design

**Features:** Vision Pro support

**In-app purchases:** none


### OpenSub

[App page](https://appshunter.io/ios/app/opensub-subscription-tracker/id6762130793)

Track recurring bills and manage subscriptions with timely reminders for trials and renewals. Visualize your spending with clear receipts and detailed analysis. Keep your financial data private and local on your iPhone and iPad.

**Highlights:** Recurring bill tracking, Trial and renewal alerts, Subscription auto-import, Spending analysis, Receipt-style summaries, Local data storage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenSub Pro Yearly | $9.99 | per year |
| OpenSub Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is FlowDown free?

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

### Is OpenSub free?

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

### Which has better reviews, FlowDown or OpenSub?

OpenSub is rated higher. FlowDown averages 4.3 out of 5 from 29 ratings, while OpenSub averages 4.5 from 2 ratings.

### Do FlowDown or OpenSub have ads?

Neither FlowDown nor OpenSub shows ads.

### Which is updated more often, FlowDown or OpenSub?

FlowDown ships an update every 4 days, and OpenSub every 2 weeks. Most recently, FlowDown was updated on November 4, 2026 and OpenSub on November 5, 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.*