# Interval Flow vs The Forge by Vitality Lounge

The clearest difference is in-app purchases: The Forge by Vitality Lounge at none against Interval Flow's 1. Interval Flow's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Interval Flow sells 1 one-off in-app purchase. The Forge by Vitality Lounge asks for nothing beyond the download.

Interval Flow ships an update every 2 weeks, The Forge by Vitality Lounge every 2 months. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Interval Flow | The Forge by Vitality Lounge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Size | 8 MB | 214 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Tegyaan](https://appshunter.io/developer/1711584632) | [Vitality Lounge GmbH & Co. KG](https://appshunter.io/developer/1577317381) |

## What reviewers say

### Interval Flow

[App page](https://appshunter.io/ios/app/interval-flow/id6469113776)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multiple Programs | $3.99 | one-time |


### The Forge by Vitality Lounge

[App page](https://appshunter.io/ios/app/the-forge-by-vitality-lounge/id6764328319)

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

**In-app purchases:** none


## Frequently asked questions

### Is Interval Flow free?

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

### Is The Forge by Vitality Lounge free?

The Forge by Vitality Lounge is free to download, with no in-app purchases.

### Do Interval Flow or The Forge by Vitality Lounge have ads?

Neither Interval Flow nor The Forge by Vitality Lounge shows ads.

### Which is updated more often, Interval Flow or The Forge by Vitality Lounge?

Interval Flow ships an update every 2 weeks, and The Forge by Vitality Lounge every 2 months. Most recently, Interval Flow was updated on October 10, 2026 and The Forge by Vitality Lounge on October 24, 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.*