# Flow Interval vs Haiku Ring

The clearest difference is update cadence: Haiku Ring at every 5 days against Flow Interval's every 3 months. Haiku Ring also leads on iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flow Interval sells 3 one-off in-app purchases and Haiku Ring sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Flow Interval ships an update every 3 months, Haiku Ring every 5 days. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Flow Interval | Haiku Ring |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/haiku-ring-visual-schedule/id6761248875/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 1 MB | 19 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takumi Kanaya](https://appshunter.io/developer/1852755878) | [RESWIN BIJU KANDATHIL](https://appshunter.io/developer/1888390638) |

## What reviewers say

### Flow Interval

[App page](https://appshunter.io/ios/app/flow-interval/id6757172069)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Large Tip | $8.99 | one-time |


### Haiku Ring

[App page](https://appshunter.io/ios/app/haiku-ring-visual-schedule/id6761248875)

This app offers a visual approach to daily planning, transforming your schedule into a 24-hour clock. Easily organize tasks, capture thoughts, and review your week at a glance. Gentle reminders help keep you on track.

**Highlights:** Visual 24-hour clock planning, Color-coded task arcs, Brain dump for unscheduled tasks, Weekly overview in clock layout, Gentle reminder notifications, Calendar sync (Pro)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Haiku Pro Monthly | $3.99 | per month |
| Haiku Pro Annual | $19.99 | per year |
| Haiku Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Flow Interval free?

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

### Is Haiku Ring free?

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

### Do Flow Interval or Haiku Ring have ads?

Neither Flow Interval nor Haiku Ring shows ads.

### Which is updated more often, Flow Interval or Haiku Ring?

Flow Interval ships an update every 3 months, and Haiku Ring every 5 days. Most recently, Flow Interval was updated on October 7, 2026 and Haiku Ring on October 6, 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.*