Comparison

The Peaceful Sleeper vs Solide | Resistance training

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

Head to head
About

The Peaceful Sleeper

This app offers expert-led sleep training and holistic parenting support for parents from newborn to toddler stages. It provides practical tools, compassionate coaching, and a supportive community to help families thrive and reduce parental stress.

Highlights
  • Step-by-step sleep training guidance
  • Expert video courses on parenting
  • Coaching and community support
  • Tools for tantrums and transitions
  • Resources for parental calm and confidence
Features
Read full description

Get your baby (and whole family) sleeping with science-backed, therapy-led sleep training and parent coaching. The Peaceful Sleeper is the app for parents who want expert-led sleep training that honors their instincts. Created by Chrissy Lawler — licensed therapist, certified sleep consultant, national best-selling author, and trusted by thousands of families — our approach is science-backed, therapy-informed, and proven to work across every stage of childhood. As featured in USA Today, The Wall Street Journal, and more. SLEEP TRAINING THAT ACTUALLY WORKS Step-by-step guidance for newborns, infants, and toddlers using methods you'll feel good about. Whether you prefer a gradual approach or need faster results, you'll find a path that fits your family — not a one-size-fits-all plan. - Newborn sleep schedules (0–3 months) - Infant sleep training (4–12 months) - Toddler sleep support (1–3 years) - Sleep regression guides (4-month, 8-month, 18-month, 2-year) - Nap transitions and wake window guidance EXPERT VIDEO COURSES — ON DEMAND Watch professional-quality lessons anytime, anywhere. Our courses cover sleep training methods, postpartum mental health, milestone sleep guides, and beyond. One subscription unlocks every course — no à la carte buying. LIVE COACHING WITH CHRISSY Get direct access to Chrissy Lawler in live group coaching calls. Bring your real sleep challenges and get real answers — not generic advice. Subscribers can apply for one-on-one support when you need personalized help. COMMUNITY OF PARENTS WHO GET IT You're not alone at 3 am. Connect with thousands of parents navigating the same challenges, share wins, ask questions, and find support from people who understand. BEYOND SLEEP: WHOLE-FAMILY WELLNESS Because parenting doesn't stop at bedtime. Access resources for tantrums, transitions, routines, and postpartum well-being — practical tools for every stage of raising kids. WHY FAMILIES CHOOSE THE PEACEFUL SLEEPER "Learning how to sleep train in an attentive, loving way has completely changed my life. I have three kids — each SO different — and used this method for all of them." — JennyB26 "The subscription is a game changer. It made it feel more accessible so I wasn't paying a large sum out of pocket." — Allie725 Join thousands of families who trust The Peaceful Sleeper. Download the app and get your first night of better sleep started tonight.

About

Solide | Resistance training

This resistance training app focuses on building long-term strength and well-being, with a curated exercise library and smart session builder. It includes a science library and breathwork exercises to support mental and physical health.

Highlights
  • Curated exercise library
  • Smart session builder
  • Science library on health benefits
  • Breathwork sessions
  • Private progress tracking
  • Longevity-focused goals
Features
Read full description

Most fitness apps were built to make you feel behind. Solide wasn't. Solide is a resistance training app built with women and non-binary people in mind, but designed for anyone who wants to feel strong, healthy, and capable for the long term. Not guilty for missing a workout. The science is clear: regular strength training reduces your risk of osteoporosis, type 2 diabetes, depression, anxiety, cognitive decline, and early death. It is one of the most evidence-backed things you can do for your health. And yet most people have never been properly shown how to do it, or told why it matters. That's the gap Solide was built to fill. A FOCUSED EXERCISE LIBRARY A carefully chosen selection of bodyweight, dumbbell, and machine movements covering every major muscle group, enough to build a lifetime of progressive training without the overwhelm of scrolling through hundreds of exercises you'll never use. A SMART SESSION BUILDER Solide builds a balanced session of 8 exercises, automatically avoiding anything you've already done this week and prioritising the muscle groups you've worked least. Change any exercise you want. SCIENCE LIBRARY Peer-reviewed research on muscle health, bone density, mental wellbeing, brain health, and longevity, written in plain language. Every article is sourced and cited. Understand the why behind every session you log. BREATH WORK A dedicated section of structured diaphragmatic breathing sessions, for stress regulation, nervous system recovery, sleep, and performance. Designed as a standalone practice alongside your training, not an add-on to it. PROGRESS TRACKING, YOUR WAY Log weight and reps with one tap. See your strength milestones surfaced quietly. No streak counter. No notification telling you how long it's been since your last session. Just an honest, private record of what you've built. BUILT FOR LONGEVITY, NOT AESTHETICS Solide has no appearance-based goals, no calorie counting, and no language about toning or sculpting. The single metric that matters is how strong and well you feel, now and in 30 years. The app is clinically informed: resistance training has been shown to reduce depressive symptoms by up to 33% (Gordon et al., JAMA Psychiatry 2018) and significantly reduce anxiety symptoms. DESIGNED WITHOUT PRESSURE No mandatory programs. No streak counters that punish rest days. No guilt-coded notifications. You open Solide when you want to feel good. The app is here when you are, and quiet when you're not. Terms of Use: https://mmf-labs.com/terms.html

Screenshots

The Peaceful Sleeper4 screens
Solide | Resistance training4 screens

Verdict

The call

The clearest difference is rating: Solide | Resistance training at 5.0 against The Peaceful Sleeper's 4.6. Solide | Resistance training also leads on update cadence (fortnightly vs every 6 months). The Peaceful Sleeper's advantage is monetization model (free vs freemium) and ratings volume (9 vs 1). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. The Peaceful Sleeper sells 1 one-off in-app purchase and Solide | Resistance training sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Solide | Resistance training holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: The Peaceful Sleeper has 9 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

The Peaceful Sleeper ships an update every 6 months, Solide | Resistance training fortnightly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
The Peaceful Sleeper versus Solide | Resistance training: the parameters behind the verdict, then further details
ParameterThe Peaceful SleeperSolide | Resistance training
PriceFreeFree
Rating4.6 (9 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings9 — better1
Update frequencyEvery 6 monthsFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.2 — better16.4
Further details — not scored
Size110 MB55 MB
Age rating4+4+
DeveloperThe Peaceful Sleeper, LLCMMF Labs

Customer experience

The Peaceful Sleeper

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Solide | Resistance training

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

The Peaceful Sleeper

One-time1
  • Newborn Sleep Course$69.99
1 purchases

Solide | Resistance training

Subscriptions1
  • Monthly1 Month trial$9.991 Month

Questions

Is The Peaceful Sleeper free?
The Peaceful Sleeper is free to download, with in-app purchases available.
Is Solide | Resistance training free?
Solide | Resistance training is free to download, with in-app purchases available.
Which has better reviews, The Peaceful Sleeper or Solide | Resistance training?
Solide | Resistance training is rated higher. The Peaceful Sleeper averages 4.6 out of 5 from 9 ratings, while Solide | Resistance training averages 5.0 from 1 ratings.
Do The Peaceful Sleeper or Solide | Resistance training have ads?
Neither The Peaceful Sleeper nor Solide | Resistance training shows ads.
Which is updated more often, The Peaceful Sleeper or Solide | Resistance training?
The Peaceful Sleeper ships an update every 6 months, and Solide | Resistance training fortnightly. Most recently, The Peaceful Sleeper was updated on October 24, 2026 and Solide | Resistance training on October 14, 2026.

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