# SOS SMS APP vs HIIT Dual Timer

The clearest difference is price: HIIT Dual Timer at Free against SOS SMS APP's $1.99. HIIT Dual Timer also leads on update cadence (every 5 days vs every 13 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

HIIT Dual Timer is free to download; SOS SMS APP costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SOS SMS APP ships an update every 13 months, HIIT Dual Timer every 5 days. The most recent releases landed on July 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | SOS SMS APP | HIIT Dual Timer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/hiit-dual-timer/id1505262060/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 2 MB | 1 MB |
| Requires iOS | 14.5 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [H Dozin](https://appshunter.io/developer/1378106545) | [BWorby Works](https://appshunter.io/developer/546372907) |

## What reviewers say

### SOS SMS APP

[App page](https://appshunter.io/ios/app/sos-sms-app/id1471360783)

**In-app purchases:** none


### HIIT Dual Timer

[App page](https://appshunter.io/ios/app/hiit-dual-timer/id1505262060)

This interval timer allows you to set custom durations for work and rest periods, and then repeat them for a specified number of rounds. It's designed for high-intensity interval training and other timed activities.

**Highlights:** Customizable work intervals, Customizable rest intervals, Set number of rounds, Simple start and go functionality, Ideal for HIIT workouts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SOS SMS APP free?

SOS SMS APP costs $1.99, with no in-app purchases.

### Is HIIT Dual Timer free?

HIIT Dual Timer is free to download, with no in-app purchases.

### Do SOS SMS APP or HIIT Dual Timer have ads?

Neither SOS SMS APP nor HIIT Dual Timer shows ads.

### Which is updated more often, SOS SMS APP or HIIT Dual Timer?

SOS SMS APP ships an update every 13 months, and HIIT Dual Timer every 5 days. Most recently, SOS SMS APP was updated on July 17, 2026 and HIIT Dual Timer on October 10, 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.*