# Interval Timer, Tabata Timer vs VesperFlow

The clearest difference is in-app purchases: VesperFlow at none against Interval Timer, Tabata Timer's 1. VesperFlow also leads on update cadence (every 2 days vs every 2 weeks). Interval Timer, Tabata Timer's advantage is iOS requirement (18.1 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Interval Timer, Tabata Timer sells 1 one-off in-app purchase. VesperFlow asks for nothing beyond the download.

Interval Timer, Tabata Timer ships an update every 2 weeks, VesperFlow every 2 days. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Interval Timer, Tabata Timer | VesperFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 6 MB | 29 MB |
| Requires iOS | **18.1** | 26.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Faycal Bessayah](https://appshunter.io/developer/1691545197) | [Timur Israilov](https://appshunter.io/developer/1667953144) |

## What reviewers say

### Interval Timer, Tabata Timer

[App page](https://appshunter.io/ios/app/interval-timer-tabata-timer/id6738628031)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One time payment | $19.99 | one-time |


### VesperFlow

[App page](https://appshunter.io/ios/app/vesperflow-workout-tracker/id6753347408)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer, Tabata Timer free?

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

### Is VesperFlow free?

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

### Do Interval Timer, Tabata Timer or VesperFlow have ads?

Neither Interval Timer, Tabata Timer nor VesperFlow shows ads.

### Which is updated more often, Interval Timer, Tabata Timer or VesperFlow?

Interval Timer, Tabata Timer ships an update every 2 weeks, and VesperFlow every 2 days. Most recently, Interval Timer, Tabata Timer was updated on October 2, 2026 and VesperFlow on October 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.*