Comparison

Obi by Dr. Sterling vs Contraction Timer

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

Head to head
About

Obi by Dr. Sterling

This app provides personalized pregnancy and toddler guidance from a board-certified ObGyn and expert team. It offers research-backed answers to common concerns, weekly updates, and a supportive community for science-minded women.

Highlights
  • Personalized pregnancy and toddler guidance
  • Expert advice from board-certified ObGyn
  • Weekly guidance updates
  • Research-backed answers
  • Supportive community forum
Features
Currently charting
Read full description

Pregnancy support that actually meets you where you are. Pregnancy comes with endless questions, 3am worries, and a healthcare system that wasn't built to give you the time or answers you deserve. Obi was created by board-certified ObGyn Dr. Noa Sterling to change that. As both an OB and a mom, Dr. Sterling experienced firsthand the gap between what women need during pregnancy and what they actually get. Every part of Obi is designed to fill that gap — so you feel informed, supported, and cared for at every stage. Because good pregnancy support shouldn't just sound reassuring. It should actually help. Inside the app, you'll get: Ask Obi — Your ObGyn-Powered AI Stop Googling. Ask Obi instead. Get trusted, evidence-based answers to your real pregnancy questions — any time of day or night — grounded in Dr. Sterling's clinical expertise. Whether you're wondering if your symptoms are normal or navigating a hard decision, support is always within reach. Weekly, Personalized Pregnancy Content Access hundreds of expert articles, videos, and bite-sized education tailored to exactly where you are in your journey. From TTC through postpartum, the right information arrives exactly when you need it — no searching required. WellBeing Tools Built for the Pregnant Brain Neuroscience-backed mindfulness tools designed to stop worry spirals before they start. Simple, calming, and actually usable at 2am. Community You'll Actually Want to Be Part Of Connect with a private community of science-minded women who get it. Ask questions, share experiences, and find your people — no judgment, just honest pregnancy conversation. Built for Every Stage TTC, pregnancy, postpartum, or navigating loss — Obi meets you where you are, with content and support that evolves with your journey. Obi users report: 96% feel more confident in their pregnancy decisions 93% say Obi's AI reduced their anxiety 89% use Dr. Sterling's WellBeing tools daily SUBSCRIPTION PRICING AND TERMS Try Obi free for 7 days. After your trial, choose the plan that works for you — monthly or annual — both of which give you full access to all app features and content for the duration of your active subscription. Payment will be charged to your account at the end of your free trial. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You may manage or cancel your subscription at any time in your Account Settings. Terms of Service: https://members.sterlingparents.com/terms Privacy Policy: https://sterlingparents.com/pages/privacy-policy

About

Contraction Timer

Effortlessly time labor contractions with a single tap from your Lock Screen, Apple Watch, or hands-free via Siri. This free app helps you track duration, intervals, and frequency to identify patterns and know when to seek medical help.

Highlights
  • One-tap contraction tracking
  • Apple Watch app
  • Lock Screen & Home Screen widgets
  • Siri hands-free timing
  • Clear timeline view
  • Smart regularity notifications
  • Private and secure
Features
Read full description

Completely FREE to use — no ads, no paywalls Take the stress out of timing contractions. With Labora Contraction Timer, you can track every contraction with just one tap — right from your Lock Screen, Apple Watch, or even hands-free with Siri.  No fumbling when the moment hits. From the first gentle tightenings to active labor, Labora keeps you calm, confident, and in control.  Track how long contractions last, how far apart they are, and how often they come — so you can see patterns and know when it’s time to call your midwife or head to the hospital. Why parents choose Labora: - One-tap tracking — start & stop instantly - Apple Watch app for quick timing on your wrist - Lock Screen & Home Screen widgets for fast access - Siri support for hands-free timing - Clear timeline showing duration & intervals - Smart notifications when contractions are regular - Private & secure — no account, no data uploads Created by a mom, for moms.

Screenshots

Obi by Dr. Sterling3 screens
Contraction Timer4 screens

Verdict

The call

The clearest difference is chart position: Obi by Dr. Sterling at #161 against Contraction Timer's unranked. Obi by Dr. Sterling also leads on iOS requirement (15.1 vs 18.0). On price, rating, review sentiment and ratings volume 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. Obi by Dr. Sterling sells 4 in-app purchases, starting at $7.99 per month and Contraction Timer sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Contraction Timer holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 38 and 101 respectively. Written reviews point the same way: 96% of Obi by Dr. Sterling's written reviews are positive against 100% of Contraction Timer's.

UpkeepUpdate frequency

Obi by Dr. Sterling ships an update every 2 weeks, Contraction Timer every 3 weeks. Both last shipped on October 24, 2026.

Scorecard2 real differences · 9 level
Obi by Dr. Sterling versus Contraction Timer: the parameters behind the verdict, then further details
ParameterObi by Dr. SterlingContraction Timer
PriceFreeFree
Rating4.8 (38 ratings)5.0 (101 ratings) — better
Positive reviews96.2% of reviews100.0% of reviews — better
Number of ratings38101 — better
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreeFree
Best chart rank#161 — better—
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.1 — better18.0
Further details — not scored
Size56 MB22 MB
Age rating17+4+
DeveloperThe Sterling Life LLCPanittha Suwannajang

Customer experience

Obi by Dr. Sterling

All ratings37 ratings
Positive94.6%
Neutral0.0%
Negative5.4%
Written reviews26 reviews
Positive96.2%
Neutral0.0%
Negative3.8%

Contraction Timer

All ratings85 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews47 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Obi by Dr. Sterling

Subscriptions4
  • Tier 1 Monthly$7.991 Month
  • Monthly Subscription7 Days trial$23.991 Month
  • Tier 1 Yearly$79.991 Year
Show 1 more
  • Yearly Subscription7 Days trial$239.991 Year
3 purchases

Contraction Timer

One-time3
  • Optional Support - Small$3.49
  • Optional Support - Medium$13.00
  • Optional Support - Large$35.00

Questions

Is Obi by Dr. Sterling free?
Obi by Dr. Sterling is free to download, with in-app purchases available.
Is Contraction Timer free?
Contraction Timer is free to download, with in-app purchases available.
Which has better reviews, Obi by Dr. Sterling or Contraction Timer?
Contraction Timer is rated higher. Obi by Dr. Sterling averages 4.8 out of 5 from 38 ratings, while Contraction Timer averages 5.0 from 101 ratings.
Do Obi by Dr. Sterling or Contraction Timer have ads?
Neither Obi by Dr. Sterling nor Contraction Timer shows ads.
Which is updated more often, Obi by Dr. Sterling or Contraction Timer?
Obi by Dr. Sterling ships an update every 2 weeks, and Contraction Timer every 3 weeks. Most recently, Obi by Dr. Sterling was updated on October 24, 2026 and Contraction Timer on October 24, 2026.

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