# Arc Timeline Recorder vs Sub20

The clearest difference is in-app purchases: Arc Timeline Recorder at none against Sub20's 1. Sub20's advantage is update cadence (every 3 days vs every 5 months) and device support (4 vs 1). On price and ads there is nothing between them.

Both are free to download. Sub20 sells 1 in-app purchase, starting at $24.99 per month. Arc Timeline Recorder asks for nothing beyond the download.

Arc Timeline Recorder ships an update every 5 months, Sub20 every 3 days. The most recent releases landed on October 4, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Arc Timeline Recorder | Sub20 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (8 ratings)](https://appshunter.io/ios/app/arc-timeline-recorder/id6499296846/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 4 MB | 10 MB |
| Requires iOS | 17.2 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Matthew Bruce Greenfield](https://appshunter.io/developer/444610547) | [Chris Edgar](https://appshunter.io/developer/6775813655) |

## What reviewers say

### Arc Timeline Recorder

[App page](https://appshunter.io/ios/app/arc-timeline-recorder/id6499296846)

This app acts as a backup for timeline recording. It runs in low power mode and takes over if the main timeline app is closed, ensuring continuous data capture without interruption.

**Highlights:** Background recording, Low power standby mode, Automatic takeover on app termination, Ensures uninterrupted timeline data

**In-app purchases:** none


### Sub20

[App page](https://appshunter.io/ios/app/sub20-5k-running-coach/id6775813653)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sub20 Monthly | $24.99 | per month |


## Frequently asked questions

### Is Arc Timeline Recorder free?

Arc Timeline Recorder is free to download, with no in-app purchases.

### Is Sub20 free?

Sub20 is free to download, with in-app purchases available.

### Do Arc Timeline Recorder or Sub20 have ads?

Neither Arc Timeline Recorder nor Sub20 shows ads.

### Which is updated more often, Arc Timeline Recorder or Sub20?

Arc Timeline Recorder ships an update every 5 months, and Sub20 every 3 days. Most recently, Arc Timeline Recorder was updated on October 4, 2026 and Sub20 on September 29, 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.*