# One at a Time vs Redline

The clearest difference is price: Redline at Free against One at a Time's $4.99. One at a Time's advantage is update cadence (every 2 days vs weekly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Redline is free to download; One at a Time costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

One at a Time ships an update every 2 days, Redline weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | One at a Time | Redline |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/redline-sprint-timer/id6807452754/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | — | Free |
| Size | 19 MB | 2 MB |
| Requires iOS | **15.1** | 16.2 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 9+ | 4+ |
| Developer | [100K31D D.O.O.](https://appshunter.io/developer/1826502418) | [STEPHEN MARK SCHLESINGER](https://appshunter.io/developer/6791812406) |

## What reviewers say

### One at a Time

[App page](https://appshunter.io/ios/app/one-at-a-time-mindful-typing/id6748601899)

**Features:** macOS Compatibility

**In-app purchases:** none


### Redline

[App page](https://appshunter.io/ios/app/redline-sprint-timer/id6807452754)

This app simplifies sprint interval training for runners. It provides customizable countdowns, voice cues, and haptic feedback for each sprint and rest period. Sessions sync with Apple Health and can be controlled via Apple Watch and the Lock Screen.

**Highlights:** Customizable sprint and rest intervals, Voice cues for transitions, Apple Watch workout integration, Lock Screen Live Activity, Apple Health syncing, No account or subscription required

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is One at a Time free?

One at a Time costs $4.99, with no in-app purchases.

### Is Redline free?

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

### Do One at a Time or Redline have ads?

Neither One at a Time nor Redline shows ads.

### Which is updated more often, One at a Time or Redline?

One at a Time ships an update every 2 days, and Redline weekly. Most recently, One at a Time was updated on October 25, 2026 and Redline on October 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.*