Deep Core vs Willow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Deep Core
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Your six-pack does nothing for your spine. Most workouts train the outer core - the visible muscles that look strong but don't protect you. Deep Core trains the muscles underneath: the deep stabilisers that wrap your spine and pelvis like an internal corset. The ones missed by crunches, planks, and every conventional ab routine. Just 5 minutes a day, completely hands-free. HOW IT WORKS Deep Core uses guided breathwork drills built on a simple principle: a forceful exhale creates the internal pressure that activates your deepest core muscles. The app coaches you through each breath - exhale, hold, inhale - with a calm voice, a clear timer, and gentle animations. Just follow along. No equipment, no floor mat required, no gym. THE EXERCISES • The Hour Glass - deep core activation through forced exhalation • Toe Taps - TVA and hip-flexor control • Glute Bridge - glutes and posterior chain • Bird Dog - contralateral spine stability • Beast - full-body deep core hold THE SCIENCE Deep Core targets the muscles research links to a pain-free, stable spine: • Transverse Abdominis - your internal corset • Pelvic Floor - co-activates to stabilise the pelvis • Multifidus - deep spinal muscles; their weakness is one of the strongest predictors of chronic lower back pain • Diaphragm - the breath that powers it all Grounded in published research on spinal segmental stabilisation, and inspired by the "cat vomit" exercise from The 4-Hour Body. BUILD THE HABIT Meet Beanie, your daily companion. Beanie lives on your home screen, tracks your streak, and celebrates every time you show up. One exercise a day is all it takes to build a stronger, more stable core over time. PRIVATE BY DESIGN Your progress stays on your device and syncs privately via iCloud. We never sell your data or use it for advertising. Analytics are optional and anonymous - you're always in control. Stronger from the inside out. Start today. Consult your doctor before starting any exercise program. If you experience pain or discomfort, stop immediately and seek medical advice.
Willow
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Desk life quietly wrecks your posture. Rounded shoulders, anterior pelvic tilt, rib flare: they build up one workday at a time. Willow helps you work against the damage with one short mobility and core session every day, built for your posture. HOW IT WORKS Tell us about your posture. Answer a few questions about your desk hours, stiffness and goals to build your posture profile. Get your daily session. Every morning, Willow generates a short mobility and core routine tailored to your profile. Follow along. Clear visuals and timers guide every move, no equipment needed. Keep the streak alive. Show up daily, we count. Reminders help you protect your streak. WHAT'S INSIDE A personalized daily session, generated from your posture profile A follow-along player with guided timing for every exercise Streaks that reward consistency, the only thing that actually improves posture An Explore library of 30+ classic routines across 6 categories: Wake Up, Hips & Lower Back, Shoulders & Upper Back, Core & Control, Unwind, Full Reset Sessions from 10 to 20 minutes, designed for real schedules Daily reminders at the time you choose WHO IT'S FOR Desk workers, remote workers, students, gamers, drivers: anyone who sits for hours and feels it in their hips, back, neck and shoulders. SUBSCRIPTION A subscription is required to access the full app experience and features. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings. Terms of Use: https://lesnants.com/terms Privacy Policy: https://lesnants.com/privacy DISCLAIMER Willow is not a substitute for medical advice. Please consult your doctor before starting any new wellness routine, especially if you have an injury or a medical condition.
Screenshots
Verdict
The clearest difference is ads: Deep Core at none against Willow's shown. Willow's advantage is iOS requirement (15.1 vs 18.0). On price, in-app purchases and device support 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. Deep Core sells 7 one-off in-app purchases and Willow sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Deep Core | Willow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 28 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | Jonathan Buchan | Les Nants |
In-app purchases
Deep Core
- Small Donation$1.99
- Medium Donation$2.99
- Winter Beanie Outfit$2.99
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- Fall Beanie Outfit$2.99
- Summer Beanie Outfit$2.99
- Spring Beanie Outfit$2.99
- Large Donation$3.99
Willow
- Willow Premium Monthly$12.991 Month
- Willow Premium Yearly7 Days trial$49.991 Year









