Comparison

Grass vs The Builder Bunker

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

Head to head
About

Grass

This app simulates a field of grass that reacts to your breath, touch, and device orientation. Experience interactive breathing exercises, gentle wind simulations, and tactile feedback.

Highlights
  • Breath-guided breathing exercises
  • Microphone-controlled wind simulation
  • Compass-oriented field direction
  • Touch-based grass combing
  • Customizable scenes and wind intensity
  • Individual blade simulation
Features
Read full description

A field of grass that breathes with you. Breathe with it. Tap BREATHE and a pacer leads you through a slow breath — in, hold, out — and the whole field follows. The grass draws in toward you as you inhale and a gust rolls away from you as you exhale, so you pace your breath by watching a meadow instead of a shrinking circle. Three patterns: a long-exhale 4·6 for settling, box breathing, and 4·7·8 for sleep. Blow on the OUT to push the gust harder. The app keeps a quiet count of your sessions and breaths — no streaks, no reminders. Blow on it. Grass listens to the microphone — but only for breath. It knows the low rush of air on the mic from a voice or a song, so talking, music, and a noisy room leave the field still; a breath rolls a gust up through it. Blow hard and it flattens; stop and it settles back. Nothing is recorded — the app measures the moment and throws the sound away. Turn it. The wind comes from north. Real north — Grass reads your compass, so the field is oriented to the room you're standing in. Turn slowly and the blades swing to keep leaning away from magnetic north. Turn all the way round and the whole field lies down the other way. Comb it. Blades bend away from your finger and stay bent, and the field remembers every path you've traced through it. Use several fingers at once; each one combs its own way. Make it yours. Four scenes — a midsummer meadow, a dry straw field, a moonlit night, a first frost. A wind slider from dead calm to blustery. A breath sensitivity control. The pacer pattern. All behind a single quiet MENU. It moves in layers, not sheets. Long blades are a longer lever with more sail area, so they catch far more of a gust than short ones. The tall stuff lies over while the low stuff only stirs — the same reason a real field ripples instead of tilting all at once. Tens of thousands of blades, each one simulated individually, on the GPU. Between your breaths the natural wind is barely there — a field at rest, waiting for you. No score. No streak. Nothing to finish, nothing to miss. Grass makes no network connection of any kind, has no account, and collects nothing. Microphone and compass readings never leave your device.

About

The Builder Bunker

This community app connects builders and creators to learn, grow, and share their projects. It offers exclusive behind-the-scenes content, live Q&A sessions, reviews, and giveaways. Join a supportive network of like-minded individuals and gain access to expert knowledge.

Highlights
  • Exclusive behind-the-scenes content
  • Live Q&A sessions with John Malecki
  • Cooking and gadget reviews
  • Giveaways and community interaction
  • Access to expert knowledge
  • Community of like-minded builders
Read full description

Discover the #1 community for those who like to get squirrely, build big, and turn their dreams into a reality! Welcome to The Builder Bunker! A place to learn, grow, laugh, and be yourself with like-minded individuals. Created by John Malecki and his team, The Bunker features exclusive behind-the-scenes content with John and his team. Multiple monthly live stream Q&As with John himself. Cooking and booze reviews, gadget reviews, giveaways, and much much more. Not to mention access to John’s expertise, but the experience of thousands of others just like you. So what are you waiting for, join today!

Screenshots

Grass3 screens
The Builder Bunker4 screens

Verdict

The call

The clearest difference is rating: The Builder Bunker at 4.8 against Grass's 3.7. The Builder Bunker also leads on update cadence (fortnightly vs every 95 months). Grass's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price, review sentiment, device support and iOS requirement 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. The Builder Bunker sells 4 in-app purchases, starting at $5.00 per month. Grass asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

The Builder Bunker holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Grass has 202 ratings behind it against 8, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Grass ships an update every 95 months, The Builder Bunker fortnightly. The most recent releases landed on October 11, 2026 and September 28, 2026 respectively.

Scorecard6 real differences · 4 level
Grass versus The Builder Bunker: the parameters behind the verdict, then further details
ParameterGrassThe Builder Bunker
PriceFreeFree
Rating3.7 (202 ratings)4.8 (8 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings202 — better8
Update frequencyEvery 95 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.5 — better
Further details — not scored
Size7 MB93 MB
Age rating4+12+
DeveloperCW&TJM Custom Builds LLC

Customer experience

Grass

All ratings202 ratings
Positive67.8%
Neutral3.0%
Negative29.2%
Written reviews20 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

The Builder Bunker

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Grass

No in-app purchases

4 purchases

The Builder Bunker

Subscriptions4
  • Hang - Monthly$5.001 Month
  • Hustle - Monthly$18.001 Month
  • Hang - Yearly$50.001 Year
Show 1 more
  • Hustle - Yearly$199.001 Year

Questions

Is Grass free?
Grass is free to download, with no in-app purchases.
Is The Builder Bunker free?
The Builder Bunker is free to download, with in-app purchases available.
Which has better reviews, Grass or The Builder Bunker?
The Builder Bunker is rated higher. Grass averages 3.7 out of 5 from 202 ratings, while The Builder Bunker averages 4.8 from 8 ratings.
Do Grass or The Builder Bunker have ads?
The Builder Bunker shows ads; Grass does not.
Which is updated more often, Grass or The Builder Bunker?
Grass ships an update every 95 months, and The Builder Bunker fortnightly. Most recently, Grass was updated on October 11, 2026 and The Builder Bunker on September 28, 2026.

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