# Boulder Trainer vs Climbing Grades Converter

The clearest difference is in-app purchases: Climbing Grades Converter at none against Boulder Trainer's 6. Climbing Grades Converter also leads on review sentiment (88% vs 70%) and iOS requirement (10.0 vs 26.0). Boulder Trainer's advantage is update cadence (every 3 days vs every 3 months) and ratings volume (859 vs 17). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Boulder Trainer sells 6 in-app purchases, starting at $1.99 per 7 days. Climbing Grades Converter asks for nothing beyond the download.

Boulder Trainer holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Boulder Trainer has 859 ratings behind it against 17, so its average is the more settled of the two. Written reviews complicate that: 70% of Boulder Trainer's written reviews are positive against 88% of Climbing Grades Converter's, so the app with the better star average is not the one people write more warmly about.

Boulder Trainer ships an update every 3 days, Climbing Grades Converter every 3 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Boulder Trainer | Climbing Grades Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (859 ratings)](https://appshunter.io/ios/app/boulder-trainer-hangboard/id770657161/reviews)** | [4.4 (17 ratings)](https://appshunter.io/ios/app/climbing-grades-converter/id1108057272/reviews) |
| Number of ratings | **859** | 17 |
| Positive reviews | 70.2% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | Free | Free |
| Size | 189 MB | 37 MB |
| Requires iOS | 26.0 | **10.0** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Jan Luther](https://appshunter.io/developer/368269906) | [Motion Apps AB](https://appshunter.io/developer/1375539590) |

## What reviewers say

### Boulder Trainer

[App page](https://appshunter.io/ios/app/boulder-trainer-hangboard/id770657161)

Create personalized training routines for climbing and bouldering. Features voice instructions, training reminders, and the ability to save and share your workout plans. Supports over 70 preset fingerboards and allows custom exercise creation for efficient progress.

**Highlights:** Custom workout creation, Voice instructions for timing, Save and share training plans, Training reminders, Over 70 preset fingerboards, Manage multiple plans

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Boulder Pro — Weekly | $1.99 | per 7 days |
| Boulder Pro Loyalty — Week | $1.99 | per 7 days |
| Boulder Pro Loyalty — Year | $11.99 | per year |
| Boulder Trainer Pro — Yearly | $17.99 | per year |
| Boulder Pro Loyalty Lifetime | $24.99 | one-time |
| Boulder Pro — Lifetime | $39.99 | one-time |

**What reviewers like**

- 👍 Customizable workouts
- 🚀 Verbal countdown feature
- 💡 Ability to share/download workouts
- 👍 Supports many hangboard models
- 👍 Helpful for improving finger strength

**What reviewers complain about**

- 🐛 Buggy and unstable
- 🔧 Confusing/unintuitive interface
- 🔧 Limited preset workout options
- 🔧 Cannot change countdown voice
- 🔧 Timer stops when app is in background

**Reported bugs**

- Cannot change hangboard selection
- Preset workouts don't match selected hangboard
- Registration/account creation issues
- Frequent crashes and connectivity problems

**Requested features**

- Ability to log/track workout history
- Integration with fitness apps (Apple Health, Strava)
- Ability to upload custom hangboard profiles
- More advanced training plans and recommendations
- Option to play music in background during workouts


### Climbing Grades Converter

[App page](https://appshunter.io/ios/app/climbing-grades-converter/id1108057272)

Easily convert climbing grades between various international systems for bouldering and route climbing. Compare difficulties across different styles and countries with an intuitive interface. Supports multiple grading scales for sport, trad, and bouldering.

**Highlights:** Convert bouldering grades, Convert route grades, Supports French, American, British, and more systems, Compare sport, trad, and bouldering grades, Intuitive grade slider, Apple Watch app integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Boulder Trainer free?

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

### Is Climbing Grades Converter free?

Climbing Grades Converter is free to download, with no in-app purchases.

### Which has better reviews, Boulder Trainer or Climbing Grades Converter?

Boulder Trainer is rated higher. Boulder Trainer averages 4.6 out of 5 from 859 ratings, while Climbing Grades Converter averages 4.4 from 17 ratings.

### Do Boulder Trainer or Climbing Grades Converter have ads?

Neither Boulder Trainer nor Climbing Grades Converter shows ads.

### Which is updated more often, Boulder Trainer or Climbing Grades Converter?

Boulder Trainer ships an update every 3 days, and Climbing Grades Converter every 3 months. Most recently, Boulder Trainer was updated on October 26, 2026 and Climbing Grades Converter on October 26, 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.*