Comparison

BoulderBook Spraywall Climbing vs Retro Flash

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

Head to head
About

BoulderBook Spraywall Climbing

Log, share, and rate boulder problems on your training wall. Never forget a climb's details on your spraywall again, whether at home, a club, or a commercial gym.

Highlights
  • Save boulder problems
  • Share climb definitions
  • Rate boulder problems
  • Use on homewalls
  • Use in climbing clubs
  • Use in commercial gyms
Features
Read full description

The spray wall app your whole crew uses for free. BoulderBook saves every boulder on your spraywall, board or home wall right on a photo of the wall – no subscription, no paid wall setup, no ads. Made by climbers for climbers, in English, German, French, Spanish, Italian, Dutch and Czech. DRAW BOULDERS IN SECONDS • Snap a photo of your wall and tap the holds – smart hold detection snaps each tap to the hold • Mark start holds, top and feet; set foothold rules and matching • Number the holds so everyone climbs the exact same sequence LOG EVERY SEND • Tick boulders as flash or redpoint and rate the grade • Thumbs up the best lines, add style tags like crimpy, slopey or dyno • Font or V-scale grades – switch any time FIND YOUR NEXT PROJECT • Browse every boulder on your wall and filter by grade, wall, style tags and what you've already sent • Sort by newest, hardest, easiest or most popular • Build project lists, share public lists or create collaborative circuits with friends CLIMB THE LEADERBOARD • Season rankings for boulderers and setters at your gym • Medals for the season's top three • Global ranking across all gyms KNOW YOUR LEVEL • Season score, grade pyramid and style breakdown • Personal insights: hardest send, flash ceiling and more • Your complete climbing history in one place STAY IN THE LOOP • Live activity feed of flashes, tops and new boulders • Gym chat and comments with photos and GIFs • Push notifications when someone comments or reacts to your boulders FOR EVERY WALL Commercial gyms, climbing clubs and private home walls – set up your gym in a minute, keep it public or invite only your crew. Find gyms near you on the map. Every feature is free for everyone. If BoulderBook helps your climbing, an optional tip in the app keeps it running. Questions or ideas? Use the feedback button in the app – we read everything.

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!

Screenshots

BoulderBook Spraywall Climbing4 screens
Retro Flash4 screens

Verdict

The call

The clearest difference is rating: Retro Flash at 4.7 against BoulderBook Spraywall Climbing's 4.0. Retro Flash also leads on ratings volume (226 vs 10). BoulderBook Spraywall Climbing's advantage is update cadence (every 3 days vs every 3 weeks). On price, review sentiment, ads and in-app purchases 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. BoulderBook Spraywall Climbing sells 5 one-off in-app purchases and Retro Flash sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Retro Flash holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Retro Flash has 226 ratings behind it against 10, so its average is the more settled of the two. Written reviews split almost evenly too, at 83% and 83% positive.

UpkeepUpdate frequency

BoulderBook Spraywall Climbing ships an update every 3 days, Retro Flash every 3 weeks. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
BoulderBook Spraywall Climbing versus Retro Flash: the parameters behind the verdict, then further details
ParameterBoulderBook Spraywall ClimbingRetro Flash
PriceFreeFree
Rating4.0 (10 ratings)4.7 (226 ratings) — better
Positive reviews83.3% of reviews — better82.9% of reviews
Number of ratings10226 — better
Update frequencyEvery 3 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size18 MB162 MB
Age rating4+4+
DeveloperFlorian ZindelArcade Bouldering UG (haftungsbeschrnkt)

Customer experience

BoulderBook Spraywall Climbing

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews18 reviews
Positive83.3%
Neutral5.6%
Negative11.1%

Retro Flash

All ratings226 ratings
Positive92.9%
Neutral3.5%
Negative3.5%
Written reviews35 reviews
Positive82.9%
Neutral8.6%
Negative8.6%

Bugs and requests

BoulderBook Spraywall Climbing

Not enough reviews yet to summarise bugs or 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

In-app purchases

5 purchases

BoulderBook Spraywall Climbing

One-time5
  • BoulderBook Unterstützer$1.00
  • BoulderBook Supporter$3.99
  • BoulderBook Unterstützer$4.00
Show 2 more
  • BoulderBook Unterstützer$9.00
  • BoulderBook Unterstützer$18.00
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

Questions

Is BoulderBook Spraywall Climbing free?
BoulderBook Spraywall Climbing is free to download, with in-app purchases available.
Is Retro Flash free?
Retro Flash is free to download, with in-app purchases available.
Which has better reviews, BoulderBook Spraywall Climbing or Retro Flash?
Retro Flash is rated higher. BoulderBook Spraywall Climbing averages 4.0 out of 5 from 10 ratings, while Retro Flash averages 4.7 from 226 ratings.
Do BoulderBook Spraywall Climbing or Retro Flash have ads?
Neither BoulderBook Spraywall Climbing nor Retro Flash shows ads.
Which is updated more often, BoulderBook Spraywall Climbing or Retro Flash?
BoulderBook Spraywall Climbing ships an update every 3 days, and Retro Flash every 3 weeks. Most recently, BoulderBook Spraywall Climbing was updated on October 24, 2026 and Retro Flash on October 24, 2026.

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