# Gym Tracking vs # Simple Invoice

The clearest difference is in-app purchases: Gym Tracking at none against # Simple Invoice's 2. # Simple Invoice's advantage is update cadence (every 8 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. # Simple Invoice sells 2 in-app purchases, starting at $1.99 per month. Gym Tracking asks for nothing beyond the download.

Gym Tracking ships an update every 2 months, # Simple Invoice every 8 days. The most recent releases landed on September 28, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Gym Tracking | # Simple Invoice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Size | 40 MB | 48 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tomas Garay](https://appshunter.io/developer/1524516581) | [YUKI TANAIKE](https://appshunter.io/developer/478558546) |

## What reviewers say

### Gym Tracking

[App page](https://appshunter.io/ios/app/gym-tracking/id6445834704)

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

**In-app purchases:** none


### # Simple Invoice

[App page](https://appshunter.io/ios/app/simple-invoice/id6761528129)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Invoice Pro (Monthly) | $1.99 | per month |
| Invoice Pro (Annual) | $18.00 | per year |


## Frequently asked questions

### Is Gym Tracking free?

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

### Is # Simple Invoice free?

# Simple Invoice is free to download, with in-app purchases available.

### Do Gym Tracking or # Simple Invoice have ads?

Neither Gym Tracking nor # Simple Invoice shows ads.

### Which is updated more often, Gym Tracking or # Simple Invoice?

Gym Tracking ships an update every 2 months, and # Simple Invoice every 8 days. Most recently, Gym Tracking was updated on September 28, 2026 and # Simple Invoice 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.*