# RPE 8 (slowdown tracker) — Are your sets hard enough?

> Are your sets hard enough? (iPhone/iPad app by 德凯 郝.)

- Source: https://appshunter.io/ios/app/rpe-8-slowdown-tracker/id6793735413 (this page in markdown: same URL + `.md`)
- Developer: [德凯 郝](https://appshunter.io/developer/6791808408)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 1 MB
- Languages: American English
- Released: 2026-07-30
- Data updated: 2026-09-13
- User reviews in markdown: https://appshunter.io/ios/app/rpe-8-slowdown-tracker/id6793735413/reviews.md

## What is RPE 8 (slowdown tracker)?

Slowdowns in free tier.

Works best in 4-20 repetition range and under a minute of time under tension.

Limitations:
Does not track well true grinder reps. Slower than 20 mm/s.
Reps with a pause mid rep are not tracked.

Free tier displays slowdowns. The number turns red when the slowdown is likely above RPE 8 for that repetition range.

Paid tier displays average repetition velocity. 


Does not collect or send any of your data, all local processing.


## Version history (last 4 releases)

### 1.9 — 2026-09-11

Updated, fuller and easier UI.

### 1.8 — 2026-09-02

Fixed subscribe button

### 1.1 — 2026-08-15

Fixed the slowdowns toggle not working.

### 1.0 — 2026-07-30

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-13.*