# Interval(x) vs C

The clearest difference is update cadence: Interval(x) at every 10 days against C's every 5 months. On price, ads, 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(x) ships an update every 10 days, C every 5 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | Interval(x) | C |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/intervalx/id6739734149/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 months |
| Monetization | Free | — |
| Size | 2 MB | 32 MB |
| Requires iOS | 18.1 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ShapeHaven Innovations LLC](https://appshunter.io/developer/1747127977) | [Legends Boxing](https://appshunter.io/developer/1398377664) |

## What reviewers say

### Interval(x)

[App page](https://appshunter.io/ios/app/intervalx/id6739734149)

An open-source interval timer designed for precision and privacy. Configure work and rest periods with millisecond accuracy for training or daily routines. It offers a transparent, data-free experience for users who value control and simplicity.

**Highlights:** Open Source Transparency, Zero Data Collection, Millisecond Interval Precision, Customizable Work/Rest Periods, Lightweight and Power-Efficient, Privacy-First Design

**Features:** macOS Compatibility

**In-app purchases:** none


### C

[App page](https://appshunter.io/ios/app/c-l1-interval-timer/id6754101559)

**In-app purchases:** none


## Frequently asked questions

### Is Interval(x) free?

Interval(x) is free to download, with no in-app purchases.

### Is C free?

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

### Do Interval(x) or C have ads?

Neither Interval(x) nor C shows ads.

### Which is updated more often, Interval(x) or C?

Interval(x) ships an update every 10 days, and C every 5 months. Most recently, Interval(x) was updated on October 6, 2026 and C on October 6, 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.*