Comparison

Unexpected Growth vs Stimmy Force

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

Head to head
About

Unexpected Growth

Experience an augmented reality art installation on a museum terrace. Explore a coral reef made of plastic waste that reacts to your presence and environmental changes. Witness the impact of human interaction on digital art.

Highlights
  • Augmented reality art experience
  • Geolocative installation
  • Site-specific artwork
  • Interactive coral reef
  • Environmental commentary
  • Dynamic visual changes
Features
Read full description

"Unexpected Growth," by Tamiko Thiel (with /p), is a geolocative, site specific augmented reality art installation commissioned by the Whitney Museum of American Art in New York. It premiered in the exhibition "Programmed: Rules, Codes, and Choreographies in Art, 1965–2018," from September 28, 2018 - April 14, 2019. To experience it, download the „Unexpected Growth“ app to your own smartphone, go onto the Whitney Museum 6th floor terrace and look around the terrace in the display of this app. You will find yourself surrounded by a coral reef, as if the sea water levels have risen to inundate the entire Whitney Museum under water. Occasional waves seem to sweep the corals back and forth - they have become mobile, to better respond to changing climate conditions. In nature, many corals are self-similar structures following simple, repetitive rules of growth, which can often be described as mathematical „Lindenmayer systems.“ Here, you can see that the corals are forming these Lindenmayer systems out of plastic waste. Is this our future, as plastic waste becomes more numerous than the fish in the sea? Construction and use of smartphones is also a factor contributing to global climate change. As more and more visitors view the corals at the Whitney, their colors slowly bleach to white. Only after many hours of rest from the mediated human gaze will the corals regain their vibrant colors.

About

Stimmy Force

This app offers a calming sensory experience with smooth, friction-free animations. Users can customize various aspects of the visual elements to reduce stress, improve focus, and promote a sense of control. It's designed to be an engaging and therapeutic tool for relaxation.

Highlights
  • Friction-free animation
  • Adjustable force, size, and color
  • Interactive drag and release mechanics
  • Offline functionality
  • Ad-free experience
Features
Read full description

Stimmy Force is a new sensory fidget designed to help reduce stress, regain focus, and restore calmness. Everyone experiences stimming on some level, and its benefits can be extremely positive - especially for individuals on the spectrum. Stimming is known to reduce anxiety, ease transition(s), lessen sensory overload, and help restore a sense of control. Features - Super smooth, friction-free animation! - Change the amount of force pull (attraction), push (strength), size, total, and select from carefully selected color palettes - Press and drag to move the balls all over the screen. They always come back! - Ad free! - No internet required! We hope you enjoy your experience and stim out with Stimmy Force!

Screenshots

Unexpected Growth1 screens
Stimmy Force3 screens

Verdict

The call

The clearest difference is price: Unexpected Growth at Free against Stimmy Force's $0.99. Unexpected Growth also leads on ratings volume (8 vs 2) and iOS requirement (12.0 vs 15). Stimmy Force's advantage is rating (5.0 vs 4.4) and update cadence (daily vs every 6 weeks). On 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

Unexpected Growth is free to download; Stimmy Force costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stimmy Force holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 8 and 2 respectively.

UpkeepUpdate frequency

Unexpected Growth ships an update every 6 weeks, Stimmy Force daily. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

Scorecard6 real differences · 4 level
Unexpected Growth versus Stimmy Force: the parameters behind the verdict, then further details
ParameterUnexpected GrowthStimmy Force
PriceFree — better$0.99
Rating4.4 (8 ratings)5.0 (2 ratings) — better
Positive reviews66.7% of reviews—
Number of ratings8 — better2
Update frequencyEvery 6 weeksDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15
Further details — not scored
Size64 MB2 MB
Age rating4+4+
DeveloperTamiko ThielKOA Interactive LLC

Customer experience

Unexpected Growth

All ratings8 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Stimmy Force

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Unexpected Growth

No in-app purchases

None

Stimmy Force

No in-app purchases

Questions

Is Unexpected Growth free?
Unexpected Growth is free to download, with no in-app purchases.
Is Stimmy Force free?
Stimmy Force costs $0.99, with no in-app purchases.
Which has better reviews, Unexpected Growth or Stimmy Force?
Stimmy Force is rated higher. Unexpected Growth averages 4.4 out of 5 from 8 ratings, while Stimmy Force averages 5.0 from 2 ratings.
Do Unexpected Growth or Stimmy Force have ads?
Neither Unexpected Growth nor Stimmy Force shows ads.
Which is updated more often, Unexpected Growth or Stimmy Force?
Unexpected Growth ships an update every 6 weeks, and Stimmy Force daily. Most recently, Unexpected Growth was updated on November 2, 2026 and Stimmy Force on November 4, 2026.

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