Comparison

Obstie vs Tether

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

Head to head
About

Obstie

Features
Read full description

Obstie is your all-in-one companion for a healthy, empowered pregnancy journey. Get instant answers from AI based on your profile, track your health and symptoms, and follow your baby’s development with personalized insights every week. Key Features: • Ask unlimited questions and receive AI guidance based in your profile, 24/7. • Track symptoms, baby movements, and vital health metrics with ease. • Access AI-powered recommendations tailored to your unique journey. • Receive personalized updates on your baby’s growth and milestones. • Enjoy a beautiful, intuitive interface designed for peace of mind. Whether you’re a first-time parent or growing your family, Obstie supports you every step of the way. Download now and experience pregnancy with confidence! Privacy Policy: https://obstie.com/privacy Terms of Use: https://obstie.com/terms

About

Tether

This app allows partners to share pregnancy progress, including daily logs, bump photos, and vital signs. It offers customizable tones and a clutter-free interface, focusing on essential tracking without ads or in-app purchases.

Highlights
  • Shared pregnancy progress with partner
  • Customizable tones (Classic/Unhinged)
  • Week-by-week baby development visuals
  • Daily log for weight, water, meds, mood
  • Bump photo tracking
  • Apple Health and Watch integration
  • Home screen widgets
Features
Read full description

Most pregnancy apps are built for one person. This one is built for two. Send your partner one invite. From then on - your week, your bump photos, your daily log, and your vitals appear on his phone too, updating as you go. He sees everything and changes nothing. No account for him to make, no second app to buy. CHOOSE HOW IT TALKS TO YOU Two tones, and you can switch between them anytime. Classic is calm and straightforward. Unhinged is the same information with jokes and a hint of sarcasm. For example: Week 8 is "Uterus Grows" in Classic, and "Waistband Rebellion" in Unhinged. In week 25, baby is the size of a rutabaga - or "a bottle of wine, unopened, obviously." The medical details underneath never change. Only the tone does. QUIET, NOT CLUTTERED Open most pregnancy apps and you get a feed, a forum, a shop, a streak, and a red badge asking you to come back. Tether has six tabs and nothing to sell you. It's built to look like the rest of your iPhone — plain type, soft colors, one thing per screen — so checking in takes seconds and asks nothing of you on a bad day. SEE BABY GROW, AND TAP IT Every week has its own illustration, from a curled embryo at week 4 to a full-term baby at 40. Tap it and it wiggles. Around it: what's developing this week, how big baby is right now, and what's happening in your body, not just the baby's. THE DAILY LOG Weight, with a chart and your change since yesterday, this week, and per week on average Water, against a goal you set Medications and vitamins, dose by dose Mood, up to eight a day, because some days are complicated A note for the day, on paper that looks like paper CRAVINGS Log what you're craving and he's told while it's still true — so if he's near a shop, he knows. They stop counting after six hours. BUMP PHOTOS, EVERY TWO WEEKS Each one unlocks as you reach it, and a carousel swipes through your whole shape-shifting year. He sees each new one appear. APPLE HEALTH AND APPLE WATCH Your weight comes in from Apple Health on its own, so you don't type it twice. If you wear an Apple Watch, your latest heart rate and blood oxygen show up on your page - and on his. There's a watch app too. Log water, medications, weight and mood from your wrist, see the week and days left without your phone, and keep the countdown on your watch face. ON YOUR HOME SCREEN Widgets for the current week, a countdown to your due date, and this week's illustration. MAKE IT YOURS Six themes with matching app icons, a nickname for baby that the whole app picks up, and reminders for water, medications and bump photos. NO ACCOUNT. NO SERVER. NO ADS. There is no Tether account, because there is no Tether server. Everything you log stays on your phone and in your own iCloud, and the only person who ever sees it is the partner you invite. Nothing is sold, because there is nobody to sell it to. ALSO INSIDE A trimester checklist for the things that are easy to forget Your week-by-week journey, for baby and for you Export everything as a spreadsheet, for your records or an appointment Tether shares general information about pregnancy, not medical advice. Always follow your doctor or midwife.

Screenshots

Obstie4 screens
Tether4 screens

Verdict

The call

The clearest difference is in-app purchases: Tether at none against Obstie's 2. Tether also leads on update cadence (every 2 days vs weekly). Obstie's advantage is iOS requirement (15.1 vs 18.0). On price, 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. Obstie sells 2 in-app purchases, starting at $3.99 per month. Tether asks for nothing beyond the download.

UpkeepUpdate frequency

Obstie ships an update weekly, Tether every 2 days. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Obstie versus Tether: the parameters behind the verdict, then further details
ParameterObstieTether
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.1 — better18.0
Further details — not scored
Size42 MB44 MB
Age rating4+17+
DeveloperTiago AntunesJames Zamora

In-app purchases

2 purchases

Obstie

Subscriptions2
  • Monthly7 Days trial$3.991 Month
  • Yearly7 Days trial$24.991 Year
None

Tether

No in-app purchases

Questions

Is Obstie free?
Obstie is free to download, with in-app purchases available.
Is Tether free?
Tether is free to download, with no in-app purchases.
Do Obstie or Tether have ads?
Neither Obstie nor Tether shows ads.
Which is updated more often, Obstie or Tether?
Obstie ships an update weekly, and Tether every 2 days. Most recently, Obstie was updated on October 18, 2026 and Tether on October 24, 2026.

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