BOB Shrine vs EchoVision
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BOB Shrine
Create offerings for an AI creature named BOB, inspired by an art installation. Name your shrine, select offerings, and add lessons. The app automates the production of your offerings as stimuli for BOB to experience.
- Create offerings for AI creature BOB
- Name and customize your shrine
- Choose from a variety of offerings
- Caption offerings with parental lessons
- Automated stimulus production for BOB
- Experience an interactive art installation
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BOB Shrine allows you to make offerings to BOB (Bag of Beliefs), an AI-based creature by Ian Cheng. Name your shrine and choose from a growing variety of offerings. Caption your offering with a parental lesson. BOB Shrine will automate the production of your offering into an ongoing pattern of stimuli for BOB to receive. If your BOB Shrine makes enough offerings, maybe one day BOB will visit… BOB Shrine coincides with the United States premiere of BOB at Gladstone Gallery, New York. The first in a new series of artificial lifeforms, BOB takes the form of a chimeric branching serpent. For more information, please visit BOBS.AI
EchoVision
Experience the world through the eyes of a bat with this mixed reality art installation. Using a bat-shaped mask and your smartphone's LiDAR, visualize echoes and understand echolocation. It offers a unique perspective on non-human sensory perception and promotes ecological appreciation.
- Simulates bat echolocation
- Mixed reality art experience
- Handheld bat-shaped masks
- Smartphone LiDAR integration
- Visualizes propagating echoes
- Promotes ecocentric design perspective
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EchoVision is an interactive mixed reality art experience that simulates bat echolocation using custom-designed, handheld, bat-shaped masks based on the open-source HoloKit headset. As users initiate sounds, they experience echolocation—the remarkable navigation method bats employ in darkness—through visual representations of propagating echoes mapped onto the real-world 3D shape of the surrounding environment, scanned in real-time by the LiDAR sensor of a smartphone mounted on the masks. By providing a unique glimpse into how non-human creatures perceive their sensory world, EchoVision promotes an ecocentric design perspective, fostering interspecies understanding and appreciation.
Screenshots
Verdict
The clearest difference is update cadence: BOB Shrine at every 11 days against EchoVision's every 2 months. BOB Shrine also leads on review sentiment (100% vs 83%) and ratings volume (14 vs 2). On price, rating, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for BOB Shrine against 5.0 for EchoVision. That said, the two scores are not equally well evidenced: BOB Shrine has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 100% of BOB Shrine's written reviews are positive against 83% of EchoVision's.
BOB Shrine ships an update every 11 days, EchoVision every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | BOB Shrine | EchoVision |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (14 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 14 — better | 2 |
| Update frequency | Every 11 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Vision Pro |
| Requires iOS | 11.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 87 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Ian Cheng | Holo Interactive |
Customer experience
BOB Shrine
EchoVision
In-app purchases
BOB Shrine
No in-app purchases
EchoVision
No in-app purchases









