Comparison

Contraction Timer ™ vs Kendamil Study

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

Head to head
About

Contraction Timer ™

Easily monitor labor patterns with a simple, intuitive interface. Log contractions with a single tap to gain smart insights into duration and frequency. Share your progress with your care team for informed support during your birthing journey.

Highlights
  • One-tap contraction tracking
  • Smart insights on duration and frequency
  • Simple, distraction-free design
  • Share and export contraction data
  • Monitor labor patterns
Features
Read full description

Track your contractions easily and stay informed. Contraction Timer™ helps you monitor your labor patterns with clarity and calm. Whether you’re timing your first contraction or in active labor, the clean, intuitive design makes it simple to log each contraction with a single tap. Why parents love Contraction Timer™ • One-Tap Tracking: Start or stop your timer instantly. • Smart Insights: View patterns for duration, frequency, and timing. • Simple, Distraction-Free Design: Focus on what matters most. • Steady Support: Stay organized and aware throughout your labor journey. • Share & Export Data: Easily send your contraction history to your care team or birth partner. Contraction Timer™ is designed to give you confidence and peace of mind as you prepare for your baby’s arrival. Join thousands of expecting parents who use Contraction Timer™ to track their progress and stay calm, focused, and ready. Terms & Conditions https://twistedsociety.github.io/ct-tos.html Privacy Policy https://twistedsociety.github.io/ct-pp.html Disclaimer Contraction Timer™ is not a medical device and does not replace professional medical advice. Always consult qualified healthcare professionals regarding any concerns about your pregnancy or labor.

About

Kendamil Study

Features
Read full description

Welcome to the Kendamil Study: The Kendamil app is a proprietary platform of ObvioHealth being used to manage a trial to study use of an investigational infant formula and how it affect infant growth and tolerance in comparison to current market formula. The Kendamil app removes the costly overhead of physical site visits and brings the trial directly to the mobile device of each subject. The result? Robust data collection, increased compliance, faster time to completion, and average cost savings of ~50% vs. traditional on-site trials. Subject Journey A subject who is identified as eligible for this study during pre-screening will be invited to download the Kendamil App via e-mail. Upon download, the participants create an account and complete the Informed Consent process. A series of screens explains the parameters of the study, including: o Privacy Policy o Data Gathering & Usage o Study Tasks & Surveys o Time Commitment o Option to Withdraw Subjects will have the opportunity to connect with a member of the study team to ask questions prior to signing the informed consent form. Intervention Period: Daily Tasks Subjects will contribute data to the study by completing questionnaires and data uploads over a 7-day baseline period and 16-week active trial period. Subjects can interact with the study team via secure chat as needed.

Screenshots

Contraction Timer ™2 screens
Kendamil Study4 screens

Verdict

The call

The clearest difference is in-app purchases: Kendamil Study at none against Contraction Timer ™'s 2. Kendamil Study also leads on iOS requirement (13.0 vs 16.6). On price, update cadence, ads 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. Contraction Timer ™ sells 2 in-app purchases, starting at $19.99 per year. Kendamil Study asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 26, 2026 and September 17, 2026 respectively.

Scorecard2 real differences · 8 level
Contraction Timer ™ versus Kendamil Study: the parameters behind the verdict, then further details
ParameterContraction Timer ™Kendamil Study
PriceFreeFree
Rating4.6 (162 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings162 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size8 MB40 MB
Age rating4+4+
DeveloperTwisted Society ABObvio Health USA Inc.

In-app purchases

2 purchases

Contraction Timer ™

Subscriptions1
  • Contraction Timer Plus3 Days trial$19.991 Year
One-time1
  • Contraction Timer Lifetime$0.99
None

Kendamil Study

No in-app purchases

Questions

Is Contraction Timer ™ free?
Contraction Timer ™ is free to download, with in-app purchases available.
Is Kendamil Study free?
Kendamil Study is free to download, with no in-app purchases.
Do Contraction Timer ™ or Kendamil Study have ads?
Neither Contraction Timer ™ nor Kendamil Study shows ads.
Which is updated more often, Contraction Timer ™ or Kendamil Study?
Contraction Timer ™ ships an update every 2 months, and Kendamil Study every 2 months. Most recently, Contraction Timer ™ was updated on September 26, 2026 and Kendamil Study on September 17, 2026.

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