# Bould vs TetherSwim

The clearest difference is in-app purchases: TetherSwim at none against Bould's 2. TetherSwim also leads on ads (none vs shown). Bould's advantage is update cadence (every 2 days vs every 2 weeks) and iOS requirement (15.1 vs 18.5). On price and device support there is nothing between them.

Both are free to download. Bould sells 2 in-app purchases, starting at $1.99 per month. TetherSwim asks for nothing beyond the download.

Bould ships an update every 2 days, TetherSwim every 2 weeks. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Bould | TetherSwim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tetherswim/id6751048224/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 54 MB | 15 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [SIOBHAN FRANCES JAMES-LYNN](https://appshunter.io/developer/1815055259) | [Patrick Biggin](https://appshunter.io/developer/1458225469) |

## What reviewers say

### Bould

[App page](https://appshunter.io/ios/app/bould/id6746081490)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $1.99 | per month |
| Unlimited access | $14.99 | per year |


### TetherSwim

[App page](https://appshunter.io/ios/app/tetherswim/id6751048224)

This app accurately tracks swimming workouts performed with resistance cords or endless pools, overcoming the limitations of traditional trackers. It estimates distance based on stroke count and efficiency, providing comprehensive workout data.

**Highlights:** Accurate distance estimates, Automatic SWOLF tracking, Full workout data (calories, heart rate), Exclude test swims, Strava integration, Automatic Water Lock mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bould free?

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

### Is TetherSwim free?

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

### Do Bould or TetherSwim have ads?

Bould shows ads; TetherSwim does not.

### Which is updated more often, Bould or TetherSwim?

Bould ships an update every 2 days, and TetherSwim every 2 weeks. Most recently, Bould was updated on October 12, 2026 and TetherSwim on October 10, 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.*