Comparison

Retro Flash vs Probly

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read 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!

About

Probly

Features
Read 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

Retro Flash4 screens
Probly3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
Retro Flash versus Probly: the parameters behind the verdict, then further details
ParameterRetro FlashProbly
PriceFreeFree
Rating4.7 (226 ratings) — better—
Positive reviews82.9% of reviews—
Number of ratings226 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size162 MB37 MB
Age rating4+4+
DeveloperArcade 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 more
  • 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

8 purchases

Retro Flash

One-time8
  • Unlock Rules for Circles$4.99
  • Home Wall Year Pass$4.99
  • 1 Month Upgrade Pass$8.99
Show 5 more
  • 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
2 purchases

Probly

Subscriptions2
  • Monthly$2.991 Month
  • Yearly$24.991 Year

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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