# Interval Timer Sec+Sec vs SHE Autoflex

The clearest difference is in-app purchases: SHE Autoflex at none against Interval Timer Sec+Sec's 1. SHE Autoflex also leads on ads (none vs shown) and update cadence (every 2 months vs every 12 months). Interval Timer Sec+Sec's advantage is iOS requirement (13 vs 16.0). On price and device support there is nothing between them.

Both are free to download. Interval Timer Sec+Sec sells 1 one-off in-app purchase. SHE Autoflex asks for nothing beyond the download.

Interval Timer Sec+Sec ships an update every 12 months, SHE Autoflex every 2 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Interval Timer Sec+Sec | SHE Autoflex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (13 ratings)](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 12 MB | 33 MB |
| Requires iOS | **13** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Ngenic](https://appshunter.io/developer/949669224) |

## What reviewers say

### Interval Timer Sec+Sec

[App page](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563)

This free interval training timer app uses alarms and vibrations to mark specified second intervals. It automatically tracks repetitions and remembers your settings, making it ideal for High Intensity Interval Training (HIIT). Background operation is limited.

**Highlights:** Second-based interval timing, Alarm and vibration alerts, Repetition counter, Saves interval settings, Suitable for HIIT, Background operation limited

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### SHE Autoflex

[App page](https://appshunter.io/ios/app/she-autoflex/id1588375885)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Interval Timer Sec+Sec free?

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

### Is SHE Autoflex free?

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

### Do Interval Timer Sec+Sec or SHE Autoflex have ads?

Interval Timer Sec+Sec shows ads; SHE Autoflex does not.

### Which is updated more often, Interval Timer Sec+Sec or SHE Autoflex?

Interval Timer Sec+Sec ships an update every 12 months, and SHE Autoflex every 2 months. Most recently, Interval Timer Sec+Sec was updated on October 23, 2026 and SHE Autoflex on October 25, 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.*