Arc Timeline Recorder vs Sub20
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arc Timeline Recorder
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.
- Background recording
- Low power standby mode
- Automatic takeover on app termination
- Ensures uninterrupted timeline data
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Arc Timeline Recorder is a companion app to Arc Timeline and Arc Mini. Leave Arc Timeline Recorder running in the background, and it will stay in low power standby mode until needed. If Arc Timeline or Arc Mini is terminated, and there is risk of a data gap in your timeline data, Arc Timeline Recorder will take over the recording role, and ensure that timeline recording continues uninterrupted.
Sub20
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Sub20 is a structured 5K training system that helps you run a faster, stronger 5K, with a clear path all the way to sub-20 if that's your goal. Enter your current 5K time and Sub20 instantly places you at the right starting point: Level 1 - Foundation: 30:00+ Level 2 - Aerobic Build: 27:00-30:00 Level 3 - Threshold Development: 25:00-27:00 Level 4 - 5K Conversion: 23:00-25:00 Level 5 - Race Specific: 21:00-23:00 Level 6 - Sub-20 Peak: under 21:00 - Personalised training levels that adapt to your current ability - Exact paces for every session, so you always know how hard to push - Benchmark tests that track real progress toward your goal time and adjust your training plan if needed - Apple Watch sync - see your session and paces on your wrist, mid-run - Simple, structured weekly plans - no guesswork, no overtraining Download Sub20 and start your next session today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Arc Timeline Recorder | Sub20 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (8 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 5 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 17.2 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthew Bruce Greenfield | Chris Edgar |
In-app purchases
Arc Timeline Recorder
No in-app purchases
Sub20
- Sub20 Monthly7 Days trial$24.991 Month
Questions
Is Arc Timeline Recorder free?
Is Sub20 free?
Do Arc Timeline Recorder or Sub20 have ads?
Which is updated more often, Arc Timeline Recorder or Sub20?
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