# Flex Log vs Copper

The clearest difference is in-app purchases: Flex Log at none against Copper's 2. Flex Log also leads on update cadence (every 5 days vs every 11 days) and iOS requirement (12.4 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Copper sells 2 in-app purchases, starting at $12.99 per month. Flex Log asks for nothing beyond the download.

Flex Log ships an update every 5 days, Copper every 11 days. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Flex Log | Copper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/copper-voice-ai-gym-log/id6745196643/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 335 MB |
| Requires iOS | **12.4** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Aaron Larner](https://appshunter.io/developer/950120608) | [Terry Ye-Hua Lin](https://appshunter.io/developer/1795137395) |

## What reviewers say

### Flex Log

[App page](https://appshunter.io/ios/app/flex-log/id6476252928)

**Features:** macOS Compatibility

**In-app purchases:** none


### Copper

[App page](https://appshunter.io/ios/app/copper-voice-ai-gym-log/id6745196643)

Effortlessly log your gym sessions by speaking naturally. This app recognizes over 1,000 exercises, automatically tracking reps, weight, and heart rate. It integrates with Apple Watch and Apple Health for seamless data capture and offers easy import/export options.

**Highlights:** Voice-first workout logging, Smart exercise recognition, Apple Watch integration, Heart rate tracking, Workout history and insights, CSV import/export, Works offline

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $12.99 | per month |
| Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is Flex Log free?

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

### Is Copper free?

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

### Do Flex Log or Copper have ads?

Neither Flex Log nor Copper shows ads.

### Which is updated more often, Flex Log or Copper?

Flex Log ships an update every 5 days, and Copper every 11 days. Most recently, Flex Log was updated on November 8, 2026 and Copper on October 30, 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.*