Comparison

Strength in Us vs Sub20

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Strength in Us

Features
Read full description

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/

About

Sub20

Features
Read full description

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

Strength in Us4 screens
Sub204 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

Strength in Us ships an update every 5 months, Sub20 every 3 days. Both last shipped on September 29, 2026.

Scorecard2 real differences ยท 4 level
Strength in Us versus Sub20: the parameters behind the verdict, then further details
ParameterStrength in UsSub20
PriceFreeFree
Update frequencyEvery 5 monthsEvery 3 days โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, iPod, Apple Watch โ€” better
Requires iOS16.415.0 โ€” better
Further details โ€” not scored
Size112 MB10 MB
Age rating4+4+
DeveloperSarah CattersonChris Edgar

In-app purchases

2 purchases

Strength in Us

Subscriptions2
  • Active$34.991 Month
  • Active Plus$49.991 Month
1 purchases

Sub20

Subscriptions1
  • Sub20 Monthly7 Days trial$24.991 Month

Questions

Is Strength in Us free?
Strength in Us is free to download, with in-app purchases available.
Is Sub20 free?
Sub20 is free to download, with in-app purchases available.
Do Strength in Us or Sub20 have ads?
Neither Strength in Us nor Sub20 shows ads.
Which is updated more often, Strength in Us or Sub20?
Strength in Us ships an update every 5 months, and Sub20 every 3 days. Most recently, Strength in Us was updated on September 29, 2026 and Sub20 on September 29, 2026.

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