# s vs Relationship Tracker

The clearest difference is in-app purchases: s at none against Relationship Tracker's 4. Relationship Tracker's advantage is update cadence (every 4 weeks vs every 9 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Relationship Tracker sells 4 in-app purchases, starting at $2.99 per month. s asks for nothing beyond the download.

s ships an update every 9 months, Relationship Tracker every 4 weeks. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | s | Relationship Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/relationship-tracker-foster/id6746739094/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 weeks** |
| Monetization | — | Freemium |
| Size | 71 MB | 72 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sedal Digital Systems SL](https://appshunter.io/developer/1626041520) | [Carbon Studio LLC (Apps)](https://appshunter.io/developer/1806005228) |

## What reviewers say

### s

[App page](https://appshunter.io/ios/app/s-flow/id1411363335)

**Features:** Vision Pro support

**In-app purchases:** none


### Relationship Tracker

[App page](https://appshunter.io/ios/app/relationship-tracker-foster/id6746739094)

This app helps you stay connected with important people by providing personalized reminders to reach out. Track your connection streaks, celebrate milestones, and add personal notes to nurture your relationships.

**Highlights:** Contact organization into circles, Customizable connection frequencies, Personalized outreach reminders, Connection streak tracking, Relationship milestone celebration, Personal notes for contacts, Avatar companion

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Foster Thrive Monthly | $2.99 | per month |
| Foster Unlimited Monthly | $4.99 | per month |
| Foster Thrive Annual | $24.99 | per year |
| Foster Unlimited Annual | $49.99 | per year |


## Frequently asked questions

### Is s free?

s is free to download, with no in-app purchases.

### Is Relationship Tracker free?

Relationship Tracker is free to download, with in-app purchases available.

### Do s or Relationship Tracker have ads?

Neither s nor Relationship Tracker shows ads.

### Which is updated more often, s or Relationship Tracker?

s ships an update every 9 months, and Relationship Tracker every 4 weeks. Most recently, s was updated on September 10, 2026 and Relationship Tracker on September 17, 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.*