# Retro Flash vs Probly

The clearest difference is update cadence: Retro Flash at every 3 weeks against Probly's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Retro Flash sells 8 one-off in-app purchases and Probly sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Retro Flash ships an update every 3 weeks, Probly every 2 months. The most recent releases landed on October 24, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | Retro Flash | Probly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (226 ratings)](https://appshunter.io/ios/app/retro-flash-climbing/id1519582483/reviews)** | — |
| Number of ratings | **226** | — |
| Positive reviews | 82.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 162 MB | 37 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arcade Bouldering UG (haftungsbeschrnkt)](https://appshunter.io/developer/1519582485) | [Arthur Beisang](https://appshunter.io/developer/1736575013) |

## What reviewers say

### Retro Flash

[App page](https://appshunter.io/ios/app/retro-flash-climbing/id1519582483)

This app helps climbers maximize their spray wall training with unique tools for setting various problems and supports multiple grading systems. It fosters a community for climbers to share and improve their training.

**Highlights:** Spray wall problem setting, Supports symmetrical, partly symmetrical, adjustable, and private walls, Circuit and competition boulder creation, Fontainebleau, Dankyu, and Hueco grading systems, Customizable grading systems, Wall upgrades for new possibilities

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Rules for Circles | $4.99 | one-time |
| Home Wall Year Pass | $4.99 | one-time |
| 1 Month Upgrade Pass | $8.99 | one-time |
| Additional Wall | $9.99 | one-time |
| Gym Year Pass Tier 1 | $14.99 | one-time |
| Add Gym | $14.99 | one-time |
| Gym Year Pass Tier 2 | $29.99 | one-time |
| 6 Months Upgrade Pass | $44.99 | one-time |

**What reviewers like**

- 👍 Easy to use and intuitive
- 💰 Free to use, affordable one-time fees
- 🏠 Perfect for home walls
- 👥 Great community feature
- 🚀 Fast and functional

**What reviewers complain about**

- 👎 Horrid UI
- 🐛 Massive bugs and data loss
- 🛠️ App is useless when buggy
- ❓ Unclear target audience
- 🧭 Navigation can be challenging

**Reported bugs**

- Cannot see sends anymore
- All boulders set to unclimbed for all users
- Statistics are gone
- Won't let me reset wall
- Won't let me delete walls

**Requested features**

- Add a tick list of all climbs done
- Show number and distribution of grades
- Copy route feature for minor adjustments
- Ability to edit names or grades of existing boulders


### Probly

[App page](https://appshunter.io/ios/app/probly/id6752620900)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $24.99 | per year |


## Frequently asked questions

### Is Retro Flash free?

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

### Is Probly free?

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

### Do Retro Flash or Probly have ads?

Neither Retro Flash nor Probly shows ads.

### Which is updated more often, Retro Flash or Probly?

Retro Flash ships an update every 3 weeks, and Probly every 2 months. Most recently, Retro Flash was updated on October 24, 2026 and Probly on July 18, 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.*