# Pace Teller vs ShiftRhythm

The clearest difference is update cadence: ShiftRhythm at every 2 days against Pace Teller's weekly. Pace Teller's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Pace Teller sells 2 in-app purchases, starting at $1.99 per month and ShiftRhythm sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Pace Teller ships an update weekly, ShiftRhythm every 2 days. The most recent releases landed on September 11, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Pace Teller | ShiftRhythm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 103 MB | 16 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [TERA](https://appshunter.io/developer/415456240) | [Jaeyoun Kim](https://appshunter.io/developer/6772886377) |

## What reviewers say

### Pace Teller

[App page](https://appshunter.io/ios/app/pace-teller-predict-your-run/id6738681954)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium(Monthly) | $1.99 | per month |
| Premium Yearly | $14.99 | per year |


### ShiftRhythm

[App page](https://appshunter.io/ios/app/shiftrhythm-shift-sleep/id6776639759)

This app helps night shift workers optimize their sleep and light exposure based on their unique roster. It provides personalized guidance for sleep, naps, and light timing to align with your body clock and manage sleep debt.

**Highlights:** Personalized sleep and nap timing, Light exposure guidance, Circadian rhythm dial, Sleep score and debt tracking, Roster presets and custom schedules, Apple Watch app and widgets

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $14.99 | per year |
| Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Pace Teller free?

Pace Teller is free to download, with in-app purchases available.

### Is ShiftRhythm free?

ShiftRhythm is free to download, with in-app purchases available.

### Do Pace Teller or ShiftRhythm have ads?

Neither Pace Teller nor ShiftRhythm shows ads.

### Which is updated more often, Pace Teller or ShiftRhythm?

Pace Teller ships an update weekly, and ShiftRhythm every 2 days. Most recently, Pace Teller was updated on September 11, 2026 and ShiftRhythm on September 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.*