Treadly vs Sub20
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Treadly
This app tracks the invisible wear on your running shoes to help you replace them before they cause injury. It syncs automatically with Strava and Apple Health, providing mileage, wear percentage, and replacement forecasts.
- Track shoe mileage and wear percentage
- Replacement countdown and forecasts
- Automatic syncing with Strava and Apple Health
- Smart shoe rotation profiles
- Share shoe milestones and ratings
- Home screen widget and Apple Watch app
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The coach that tells you why. Every plan app adjusts. Treadly is the running coach that tells you why each run is there, puts every change to you before it makes it, and keeps a record of how its calls held up. The way a human coach would, on your iPhone and Apple Watch. Every run has a reason. Today's run says why it exists. Trimmed to 4.2 miles at readiness 36. Eased twenty seconds a mile for the heat. Every number that comes from the research opens to the paper behind it, and the week header shows the climb cap out loud. Readiness comes from your sleep, HRV, and resting heart rate in Apple Health. Coach calls. A bad night, a heat wave, a missed run, a sore knee. The coach proposes a change and waits. Accept or undo. Hurt, sick, or life keeps your streak safe. If a change would be too small to notice, it does not ask at all. A coach on the record. Every call and your answer go on the record. "You took the ease-day call 8 times. Next runs averaged B+." Called vs ran grades the coach's own pace calls against what you ran. Your race confidence comes with a finish window that narrows as race day nears, and locks two weeks out so you cannot cram. Someone can see your run. Free. Add up to three safety contacts. When you run, they can follow a live page that opens in any browser, no app and no account. Slide for SOS on your phone, your watch, or the Lock Screen and they hear first, with your location and your local emergency number one tap away. If your phone goes silent, they get a text, and one more when you are back. On race day, make a link from your race letter and send it to anyone: they see where you are on the course and your projected finish. The run itself. Treadly records the run, on your watch or just your phone. Two real voices in your ear, never a robot. Pace and heart-rate zones on your wrist, reps counted as you run them, and auto-pause that waits for you. If you live on Strava, Garmin, or COROS, connect once and it all flows in. Plans for any race. 5K to marathon, from your pace today. Compare coaching approaches with real numbers before you commit. Strength days live on the plan too, timed from your wrist. New to running? Your first month on the ladder is free. Shoes, free forever. Every pair gets a role. Treadly spreads the miles so shoes wear out on schedule instead of by surprise, and tells you when one is done. Run with people. Send a run to a friend and it lands on both plans, your long run included. They get two weeks of Pro when they join. Pair with one partner who sees the shape of your week and hears when a run goes by. What is free, what is Pro. Shoes, readiness, the science library, and safety contacts are free. The coach's calls, the record, inviting a friend, and a partner are Pro, after a 14-day trial that starts with your first run. $9.99 a month or $59.99 a year. Treadly depends on your phone's signal and battery and is not a substitute for emergency services. Coaching is grounded in published training science and is not medical advice. Terms of Use: https://treadly.run/terms
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 iOS requirement: Sub20 at 15.0 against Treadly's 17.0. On price, update cadence, ads and in-app purchases 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. Treadly sells 2 in-app purchases, starting at $9.99 per month and Sub20 sells 1 in-app purchase, starting at $24.99 per month. Whichever you choose, the download price is not the number that matters.
Treadly ships an update every 4 days, Sub20 every 3 days. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.
| Parameter | Treadly | Sub20 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (15 ratings) — better | — |
| Positive reviews | 90.0% of reviews | — |
| Number of ratings | 15 — better | — |
| Update frequency | Every 4 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 99 MB | 10 MB |
| Age rating | 12+ | 4+ |
| Developer | Treadly Limited Liability Company | Chris Edgar |
In-app purchases
Treadly
- Treadly Pro14 Days trial$9.991 Month
- Treadly Pro14 Days trial$59.991 Year
Sub20
- Sub20 Monthly7 Days trial$24.991 Month









