# Obstie vs Tether

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.

Both are free to download. Obstie sells 2 in-app purchases, starting at $3.99 per month. Tether asks for nothing beyond the download.

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

## The numbers

| Metric | Obstie | Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/tether-pregnancy-tracker/id6812428424/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | — | Free |
| Size | 42 MB | 44 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Tiago Antunes](https://appshunter.io/developer/1822143190) | [James Zamora](https://appshunter.io/developer/1825511295) |

## What reviewers say

### Obstie

[App page](https://appshunter.io/ios/app/obstie/id6747640840)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $24.99 | per year |


### Tether

[App page](https://appshunter.io/ios/app/tether-pregnancy-tracker/id6812428424)

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:** Apple Watch app

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*