Comparison

Boulder Trainer vs Climbing Grades Converter

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

Head to head
About

Boulder Trainer

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
Read full description

Boulder Trainer is the training app for your hangboard: 90 boards are built in, you build your own plans in minutes, and a voice tells you when to hang and when to rest - on iPhone or straight from your Apple Watch. Get started right away: 90 common training boards are included with high-resolution artwork. Pick your board, download a ready-made plan or build your own. No account needed, everything works offline. Training + Custom training plans with sets, hang times and rest times + Download ready-made plans and shared community plans - free + Voice cues and signal tones so you never have to look at the screen + Exercise library with photos: hangboard, floor, gym (with weight), prehab + Training reminder every 2, 3, 5 or 7 days Apple Watch + Browse plans on your wrist and start the session from there + Haptic feedback on every change + Recorded as a workout in Apple Health incl. heart rate and activity rings Keep the habit + Habits (daily or with a counter), up to 3 reminders per day + Streaks with celebration moments when you keep the run alive + 31 achievements in four categories + Home Screen and Lock Screen widgets, Control Center toggle, check off right in the widget Your board is missing? Just photograph it: cut it out, align it, number the holes - done. Or write me: support@boulder-trainer.com Your data + iCloud sync across your devices, no sign-up + Works fully offline + iPhone and iPad These 90 boards are built in: + Metolius: Project, Wood Grips Compact, Wood Grips II Compact, Wood Grips II Deluxe, Wood Grips Training, Contact, Simulator 3D, Rock Rings, Foundry, Campus Blocks, Campus Rungs, Lite Rail, Prime Rib + Beastmaker: 1000, 2000 + So iLL: Blister, Wood Blister, Reaper, Iron Palm, Mini Palm, SlopeyMon, Boost, Remedy, Hangers, All Chalk No Action + Antworks: Power Ant Mini, Strong Ant 1, Strong Ant 2, Strong Ant 2 (old version), Strong Ant 3, Strong Ant 4 Solo + Moon Climbing: Fingerboard, Phat Boy + Tension: Flash Board, Grindstone, Grindstone Pro, Grindstone Mk2 + Crusher Holds: Matrix, Faceon, Megarail, Mission Portable + Kraxl: Classic, Portable, Rock, Xtrem + ERZI: small, medium, large, campus + MAX CLIMBING: MAX CLIMBING, Spinch Solo Easy, Spinch Solo Hard, Spinchboard Easy, Spinchboard Hard + EPUSA / Entre Prises: Kineboard, Hang Time, Training Board + Trango: Rock Prodigy, Rock Prodigy Forge + Eva López: Progression, Transgression + Problemsolver: Hanzo, Trainingsboard + DRCC: V3 Hangboard, V5-12 Hangboard + Vola: Hangboard, Pinch / Sloper + ALPIDEX: PRO 2.0, Large + Nicros: Ultimate, Warrior + Dein Klettershop: EVOLUTION, BB Sport Pro + Single boards: Bergfreunde Flash, Core Fingerboard, OCUN Fingerboard, Ascender X8, Wataaah Transformer Starr, Sic Grips Pocket Rock, Crimpmonster, Captain Fingerfood, Griptonite smartrock, PUC II Domini, Decathlon Ballsy, Kraxel To Go, Danger BuddyBoard, Revolution Grillito, Clevo, Frictitious Megalith, OK Board Crag Developer statement: When I bought my first fingerboard there was no reasonable guide for training on it. That is why I built Boulder Trainer. Please keep in mind: there is no company behind this app, just a small private project. Like Boulder Trainer on Facebook: www.facebook.com/BoulderTrainer Boulder Trainer Pro (subscription / one-time purchase): Starting workouts, habit check-ins and the achievements page require Boulder Trainer Pro - as a weekly subscription, yearly subscription or lifetime one-time purchase. Creating plans, setting up boards and sharing stay free. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period; manage and cancel anytime in your Apple ID settings. If you bought the app in the past, training stays free for you and you get exclusive loyalty pricing. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://app-bis-web.de/datenschutz/

About

Climbing Grades Converter

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
Read full description

Ever wonder what your climbing grade is in another system? Ever want to compare grades between different styles of climbing? Well worry no longer! In any country, for any climbing rating system, Climbing Grades Converter is a simple, elegant and intuitive tool that seamlessly transitions between climbing grades, for any type of climbing, anywhere you go. Featuring comparable scales for Sport, Trad, and bouldering, this integrated, custom designed app brings beta to the crag at a touch of tape-covered fingers. The easy to use grade converter allows you to select which grades you want to use, and what you’re most familiar with for it to guide you through how to compare your climbing difficulty for any system! Simply select which styles and climbing modes you want to compare and then use the grade slider to flip between different difficulties! Apple Watch: CGC now have a Apple watch app so you easily can translate you grades in a tap by the crag! With Climbing Grades, you’ll get access to all of these climbing systems and history their history: Bouldering grades: • French Fontainebleau grades • American Hueco V-scale • British The Gill 'B' system • British technical grades • Japanese Dankyu system Route grades: • French numerical grades • American (Yosemite Decimal System) • British (Technical) • British adjectival Ewbank • (Australia) Ewbank • (South Africa) Union • Internationale des Associations d’Alpinisme (UIAA) • Swedish / Norwegian • Finnish • Saxon • Brazilian So what are you waiting for? Download this free app and you’re ready to rock! Climb hard my friends, climb hard!

Screenshots

Boulder Trainer4 screens
Climbing Grades Converter4 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
Boulder Trainer versus Climbing Grades Converter: the parameters behind the verdict, then further details
ParameterBoulder TrainerClimbing Grades Converter
PriceFreeFree
Rating4.6 (859 ratings) — better4.4 (17 ratings)
Positive reviews70.2% of reviews87.5% of reviews — better
Number of ratings859 — better17
Update frequencyEvery 3 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS26.010.0 — better
Further details — not scored
Size189 MB37 MB
Age rating4+4+
DeveloperJan LutherMotion Apps AB

Customer experience

Boulder Trainer

All ratings860 ratings
Positive92.7%
Neutral3.0%
Negative4.3%
Written reviews215 reviews
Positive70.2%
Neutral7.4%
Negative22.3%

Climbing Grades Converter

All ratings17 ratings
Positive82.4%
Neutral5.9%
Negative11.8%
Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

Bugs and requests

Boulder Trainer

Reported bugs

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

Requested features

5 requests
  • 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

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Boulder Trainer

Subscriptions4
  • Boulder Pro — Weekly$1.997 Days
  • Boulder Pro Loyalty — Week$1.997 Days
  • Boulder Pro Loyalty — Year$11.991 Year
Show 1 more
  • Boulder Trainer Pro — Yearly3 Days trial$17.991 Year
One-time2
  • Boulder Pro Loyalty Lifetime$24.99
  • Boulder Pro — Lifetime$39.99
None

Climbing Grades Converter

No in-app purchases

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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