# Triathlon vs Sidewall

The clearest difference is price: Sidewall at Free against Triathlon's $0.99. Sidewall also leads on update cadence (every 5 days vs every 8 months) and iOS requirement (18.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Sidewall is free to download; Triathlon costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Triathlon ships an update every 8 months, Sidewall every 5 days. The most recent releases landed on October 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Triathlon | Sidewall |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Size | 6 MB | 2 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Frank Kalhoj](https://appshunter.io/developer/1102879894) | [Tim Heuer](https://appshunter.io/developer/1231875166) |

## What reviewers say

### Triathlon

[App page](https://appshunter.io/ios/app/triathlon-calc/id1104662504)

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

**In-app purchases:** none


### Sidewall

[App page](https://appshunter.io/ios/app/sidewall/id6759263371)

**In-app purchases:** none


## Frequently asked questions

### Is Triathlon free?

Triathlon costs $0.99, with no in-app purchases.

### Is Sidewall free?

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

### Do Triathlon or Sidewall have ads?

Neither Triathlon nor Sidewall shows ads.

### Which is updated more often, Triathlon or Sidewall?

Triathlon ships an update every 8 months, and Sidewall every 5 days. Most recently, Triathlon was updated on October 26, 2026 and Sidewall on October 7, 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.*