# Interval Timer Calendar vs GDF HEMA Timer

The clearest difference is ads: GDF HEMA Timer at none against Interval Timer Calendar's shown. Interval Timer Calendar's advantage is update cadence (every 3 days vs every 3 months) and iOS requirement (11.0 vs 13.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Interval Timer Calendar ships an update every 3 days, GDF HEMA Timer every 3 months. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Interval Timer Calendar | GDF HEMA Timer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 53.8% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 14 MB | 18 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [isao utsumi](https://appshunter.io/developer/800652888) | [Dmytro Lisitsyn](https://appshunter.io/developer/1848217783) |

## What reviewers say

### Interval Timer Calendar

[App page](https://appshunter.io/ios/app/interval-timer-calendar/id1507102637)

This app helps you track your workouts with a simple timer and calendar integration. Set your training and break times, and automatically record your sessions. Save custom timers for quick access to your favorite routines.

**Highlights:** Muscle training timer, Automatic calendar recording, Save custom timer lists, Background operation support, Notification alerts, Workout review on calendar

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

**In-app purchases:** none


### GDF HEMA Timer

[App page](https://appshunter.io/ios/app/gdf-hema-timer/id6754407702)

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

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer Calendar free?

Interval Timer Calendar is free to download, with no in-app purchases.

### Is GDF HEMA Timer free?

GDF HEMA Timer is free to download, with no in-app purchases.

### Do Interval Timer Calendar or GDF HEMA Timer have ads?

Interval Timer Calendar shows ads; GDF HEMA Timer does not.

### Which is updated more often, Interval Timer Calendar or GDF HEMA Timer?

Interval Timer Calendar ships an update every 3 days, and GDF HEMA Timer every 3 months. Most recently, Interval Timer Calendar was updated on September 25, 2026 and GDF HEMA Timer on September 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.*