Retro Flash vs Probly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Retro Flash
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.
- 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
Read full descriptionHide full description
Welcome to Retro Flash and the Arcade Bouldering Community! Retro Flash is the Ultimate Spray Wall App, designed with every member of the climbing community in mind! We have created a lot of unique tools to ensure that everyone has everything they need to get the most out of their spray walls! For example, we support symmetrical, partly symmetrical, adjustable and private walls! Set all kinds of problems on your wall, like circuits or even competition boulders! With our wall upgrades, we upgrade your walls to the next level, opening up a lot of new possibilities! Now, you can even upgrade your walls by yourself!! Retro Flash supports the Fontainebleau, Dankyu and Hueco grading systems. You can also define your own grading systems or even deactivate grading! Download Retro Flash now and become a part of our growing community!
Probly
Read full descriptionHide full description
Your home wall deserves its own app. You built the wall. You set the problems. You text your crew when there's something new. Probly replaces all of that with one place - problems documented on actual photos of your wall, a private feed for your crew, and a history that survives every reset. SET PROBLEMS IN SECONDS Tap directly on your wall photo to mark the holds. Set the grade. Done. No descriptions, no tape legend, no "wait, which sloper is the start?" Adding a new problem takes seconds - so you'll actually do it. YOUR WALL'S OWN COMMUNITY Invite the people who climb on your wall. They can add problems, log sends, and comment on routes - all in a private feed that belongs to your wall. Not a public platform. Just your crew. RESETS DON'T ERASE HISTORY Upload a new wall photo when you move holds or add volumes. All your old problems stay intact. Your wall evolves; your history doesn't disappear. WORKS ON ANY WALL Garage woody, spray wall, slab, steep board - if you can photograph it, Probly works on it. No specialized hardware required. FREE TO START Add your wall and up to 10 problems at no cost. Unlimited problems and multiple walls are $1/month - less than any other climbing app. FEATURES - Tap-to-place hold marking on real wall photos - Private activity feed per wall - Invite and manage your climbing crew - Upload new wall photos without losing old problems - Multiple walls, each with their own crew ($1/month) Terms of use: https://www.abiv.work/probly-terms-and-conditions
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Retro Flash | Probly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (226 ratings) — better | — |
| Positive reviews | 82.9% of reviews | — |
| Number of ratings | 226 — better | — |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 162 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Arcade Bouldering UG (haftungsbeschrnkt) | Arthur Beisang |
Bugs and requests
Retro Flash
Reported bugs
8 issues- 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
Show 3 moreShow fewer
- Won't let me add a new wall on a new account
- Camera button to add a photo doesn't do anything
- Can't change the angle of the wall
Requested features
4 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Retro Flash
- Unlock Rules for Circles$4.99
- Home Wall Year Pass$4.99
- 1 Month Upgrade Pass$8.99
Show 5 moreShow fewer
- Additional Wall$9.99
- Gym Year Pass Tier 1$14.99
- Add Gym$14.99
- Gym Year Pass Tier 2$29.99
- 6 Months Upgrade Pass$44.99
Probly
- Monthly$2.991 Month
- Yearly$24.991 Year









