Strength in Us vs Sub20
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Strength in Us
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The fitness app you've been searching for is finally here. Sick of juggling nutrition apps, workout apps, and online portals just to get through your training? I was too. That's why I built StrengthinUs - everything you actually need in one place. I've been where you are. The bigger girl who hated sports. Confused about workouts. Yo-yo dieting. Binge eating. Scared of carbs and losing my period chasing the "perfect" body. But I changed - and kept those changes. Now I want to help you do the same. What makes StrengthinUs different? No more app juggling - Built-in food tracker with barcode scanner Real education - Learn why, not just what. Keep changes for life Programmes that work - Strength, HYROX, running, yoga - all structured and progressive Community that lifts you - Connect with women who actually get it Choose your journey: Active - Self-guided programmes and education Active Plus - Structured HYROX and running plans plus exclusive content Features included: - Progressive strength training for home and gym - HYROX workouts from an experienced coach - Running plans (5K to marathon) - 100+ yoga and meditation classes - Personalised calories and macros - Thousands of recipes updated weekly - Period and hormone tracking - Complete nutrition education library - Private community access This isn't another generic fitness app. It's the one you needed but couldn't find built from 15,000+ women helped worldwide already. You weren't failing. You just didn't have the right support. Now you do. Read our terms and conditions: https://joinstrengthinus.com/terms-and-conditions/ Read our privacy policy: https://joinstrengthinus.com/privacy-policy/ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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 update cadence: Sub20 at every 3 days against Strength in Us's every 5 months. Sub20 also leads on device support (4 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Strength in Us sells 2 in-app purchases, starting at $34.99 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.
Strength in Us ships an update every 5 months, Sub20 every 3 days. Both last shipped on September 29, 2026.
| Parameter | Strength in Us | Sub20 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Every 3 days โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad, iPod, Apple Watch โ better |
| Requires iOS | 16.4 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 112 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Sarah Catterson | Chris Edgar |
In-app purchases
Strength in Us
- Active$34.991 Month
- Active Plus$49.991 Month
Sub20
- Sub20 Monthly7 Days trial$24.991 Month









