# InterTimer vs Flapper

The clearest difference is review sentiment: InterTimer at 100% against Flapper's 50%. InterTimer also leads on in-app purchases (none vs 2) and device support (3 vs 1). Flapper's advantage is update cadence (daily vs every 27 months). On price and ads there is nothing between them.

Both are free to download. Flapper sells 2 in-app purchases, starting at $3.99 per month. InterTimer asks for nothing beyond the download.

InterTimer ships an update every 27 months, Flapper daily. The most recent releases landed on September 15, 2026 and August 1, 2026 respectively.

## The numbers

| Metric | InterTimer | Flapper |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Daily** |
| Monetization | **Free** | Freemium |
| Size | 34 MB | 14 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [byeongyun kwon](https://appshunter.io/developer/1709899572) | [Yong Lee](https://appshunter.io/developer/1884179894) |

## What reviewers say

### InterTimer

[App page](https://appshunter.io/ios/app/intertimer-interval-timer/id6471410531)

Create custom interval training routines with adjustable exercise and rest periods. Receive voice notifications for round changes and visualize remaining time. Track monthly exercise duration with a graph and get reminders to stay consistent with your fitness goals.

**Highlights:** Customizable exercise and rest slots, Repeatable rounds, Voice notifications for round changes, Visual representation of remaining time, Monthly exercise time graph, Workout reminders

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

**In-app purchases:** none


### Flapper

[App page](https://appshunter.io/ios/app/flapper-adhd-companion/id6760871604)

This app acts as a gentle daily companion for individuals with ADHD, offering support without lectures or manual logging. It learns your patterns and rhythms to help you stay on track by observing your calendar, reminders, and location.

**Highlights:** Zero-input pattern observation, Automatic calendar and reminder integration, Anchor event countdowns and preparation steps, AI-assisted project decomposition, Live Activities for real-time updates, Smart routine nudges, Medication tracking with effect countdowns

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flapper Lite | $3.99 | per month |
| Flapper Pro | $6.99 | per month |


## Frequently asked questions

### Is InterTimer free?

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

### Is Flapper free?

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

### Do InterTimer or Flapper have ads?

Neither InterTimer nor Flapper shows ads.

### Which is updated more often, InterTimer or Flapper?

InterTimer ships an update every 27 months, and Flapper daily. Most recently, InterTimer was updated on September 15, 2026 and Flapper on August 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.*