# Interval Flow vs Firefly Time

The clearest difference is update cadence: Interval Flow at every 2 weeks against Firefly Time's every 2 months. Interval Flow also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Interval Flow sells 1 one-off in-app purchase and Firefly Time sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Interval Flow ships an update every 2 weeks, Firefly Time every 2 months. The most recent releases landed on September 8, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Interval Flow | Firefly Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/firefly-time-focus-and-breathe/id6740221129/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 8 MB | 5 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tegyaan](https://appshunter.io/developer/1711584632) | [智超 张](https://appshunter.io/developer/1670219085) |

## 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 |


### Firefly Time

[App page](https://appshunter.io/ios/app/firefly-time-focus-and-breathe/id6740221129)

This app provides a serene companion for moments of peace and strength amidst daily stress. It encourages focusing on small, mindful activities like tasks, reading, or breathing to combat anxiety and find calm.

**Highlights:** Focus timer for tasks, Calm breathing exercises, Stress relief techniques, Mindfulness moments, Healing music integration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annually | $6.99 | per year |
| Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Interval Flow free?

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

### Is Firefly Time free?

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

### Do Interval Flow or Firefly Time have ads?

Neither Interval Flow nor Firefly Time shows ads.

### Which is updated more often, Interval Flow or Firefly Time?

Interval Flow ships an update every 2 weeks, and Firefly Time every 2 months. Most recently, Interval Flow was updated on September 8, 2026 and Firefly Time on June 1, 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.*