Comparison

Master Solutions vs PreOpApp Kids

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

Head to head
About

Master Solutions

Features
Read full description

We started in 2007 to provide our services to our customers through a set of life skills. The development of work includes a set of strategic institutions with leading alliances in the administrative and educational fields.

About

PreOpApp Kids

This app uses interactive games and friendly characters to help children and their families feel less anxious about upcoming surgery. It provides visual preparation, smart guidance, and resources for parents, aiming to build confidence and reduce stress.

Highlights
  • Interactive games for hospital familiarization
  • Friendly characters for reassurance
  • Kid-friendly visual preparation stories
  • Smart reminders for surgical preparation
  • Parent resources and guidance
  • Physiology-responsive calming experiences
  • Motivational challenges for anesthesia induction
Features
Read full description

PreOpApp™ Kids is a patent-pending pediatric surgery preparation app with innovative technology designed to make preparing for surgery easier and less stressful for children and families. Created by a pediatric anesthesiologist, PreOpApp™ Kids helps parents and caregivers prepare their child for surgery and anesthesia with child-friendly education, calming tools, fasting reminders, stories, and interactive activities. Key Features: Interactive Games: Engaging, age-appropriate activities that help children become familiar with the hospital and operating room environment while encouraging calm breathing, focus, and emotional regulation. Practice blowing into the anesthesia mask with Little Hottie™! Also practice making a calming, centering Mandala that will sync with your child’s heart rate on the day of surgery with Mandala Sync™! Friendly Characters: A spark of courage flame (Little Hottie™), a cheerful goldfish, a cuddly sheep, a curious kitten, and other companions guide children through their surgical journey with warmth and reassurance. Kid-Friendly Hospital Preparation: Visual storytelling helps children understand what happens before surgery, reducing fear of the unknown and helping them feel more prepared. Download the Dream Fetcher interactive book today, available in the Kid Zone of PreOpApp™ Kids. Smart Guidance: Gentle, timely reminders that support surgical preparation, reduce last-minute stress, ease the burden on busy families, and help everyone stay on track. Enter your child’s arrival time for their surgery and this app will tell you what to do next to prepare your child. No stress. Future versions of PreOpApp™ Kids are designed to support secure integration with hospital systems to further improve communication between families and their surgical and anesthesia teams. Parent Resources: Practical guidance and tips for caregivers to help prepare their child for surgery with confidence. Beyond Preparation: Utility on the Day of Surgery Clinical Support: PreOpApp™ Kids can be used by anesthesiologists, CRNAs, CAAs, child life specialists, and other anesthesia team members to help support calmer transitions during induction of anesthesia. It can also support children in the preoperative holding area and provide comfort during transport to the operating room. Physiology-Responsive Experiences: A key innovation of PreOpApp™ Kids is that its games gently synchronize with a child’s natural breathing rhythm and heart rate. Visual and audio elements flow in real time with the child, creating a calming, immersive experience that supports connection and comfort during anesthesia induction. Motivational Challenges: Interactive games that invite children to remember playful details as they drift off to sleep — a modern, engaging alternative to familiar counting challenges like “How high can I count?” during anesthesia induction or counting sheep to fall asleep. Buy Mandala Sync™ today in the Kid Zone of PreOpApp™ Kids. Why PreOpApp™ Kids? Surgery can be overwhelming for children and families. By blending evidence-based approaches with engaging games and interactive technology, PreOpApp™ Kids makes preparation feel less scary and more empowering.  Children learn what to expect, families feel supported, and the hospital experience becomes calmer for everyone involved. Created by a pediatric anesthesiologist, PreOpApp™ Kids is designed to complement the care children receive in hospitals while giving parents peace of mind that their child feels safe, supported, and ready. PreOpApp™ Kids: Turning surgery prep into a journey of learning, confidence, and calm — from at home to the operating room. Educational guidance is based on published anesthesia guidelines and supporting literature: sources available inside the app.

Screenshots

Master Solutions4 screens
PreOpApp Kids4 screens

Verdict

The call

The clearest difference is in-app purchases: Master Solutions at none against PreOpApp Kids's 3. Master Solutions also leads on update cadence (every 3 days vs every 11 days). On price, ads, device support and iOS requirement 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. PreOpApp Kids sells 3 one-off in-app purchases. Master Solutions asks for nothing beyond the download.

UpkeepUpdate frequency

Master Solutions ships an update every 3 days, PreOpApp Kids every 11 days. Both last shipped on October 30, 2026.

Scorecard2 real differences · 8 level
Master Solutions versus PreOpApp Kids: the parameters behind the verdict, then further details
ParameterMaster SolutionsPreOpApp Kids
PriceFreeFree
Rating—4.9 (17 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—17 — better
Update frequencyEvery 3 days — betterEvery 11 days
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size75 MB1.0 GB
Age rating4+4+
DeveloperEMCAN-TECLN Welsh MD Anesthesiologist, LLC

In-app purchases

None

Master Solutions

No in-app purchases

3 purchases

PreOpApp Kids

One-time3
  • Little Hottie$2.99
  • Mandalasync Game$2.99
  • Dream Fetcher Book$9.99

Questions

Is Master Solutions free?
Master Solutions is free to download, with no in-app purchases.
Is PreOpApp Kids free?
PreOpApp Kids is free to download, with in-app purchases available.
Do Master Solutions or PreOpApp Kids have ads?
Neither Master Solutions nor PreOpApp Kids shows ads.
Which is updated more often, Master Solutions or PreOpApp Kids?
Master Solutions ships an update every 3 days, and PreOpApp Kids every 11 days. Most recently, Master Solutions was updated on October 30, 2026 and PreOpApp Kids on October 30, 2026.

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