Comparison

BastionChat vs OBJ Viewer

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

Head to head
About

BastionChat

Features
Read full description

Private AI that runs entirely on your iPhone, iPad and Mac. Chat with your documents, get instant summaries and ask out loud, with no internet, no account and no data collected. ASK YOUR DOCUMENTS Import a contract, a manual, a report or a scanned PDF. Ask in your own words and get a clear answer, with the source one tap away, so you can check it instead of trusting it. Small documents are read in full; large libraries are searched. INSTANT SUMMARIES Turn a long file into the key points: parties, dates, amounts, conditions. JUST ASK OUT LOUD Voice mode with on-device speech recognition. Nothing is uploaded. UNDERSTANDS IMAGES Ask about photos and screenshots with vision models. WORKS OFFLINE On a plane, at sea, underground: the AI model lives on your device, so it keeps working. In airplane mode, web tools are simply not offered. PRIVATE BY DESIGN No account. No tracking. Your documents and conversations never leave the device. Apple's privacy label: Data Not Collected. Lock the app with Face ID using iOS's built-in app protection. YOUR CHOICE OF MODEL A curated catalog of open models (Qwen, Gemma, Phi, LFM and more) sized for your device: fast ones on iPhone, larger ones on iPad and Mac. Or import any GGUF model from Hugging Face. FOR POWER USERS Adjustable thinking (Off, Short, Full), calculator, optional web search, MCP tools for agent workflows. ONE PURCHASE No subscription, no usage limits, Family Sharing. Download a model once, then everything runs locally. Requires iOS 18 or later. Larger models need more memory; the app recommends what fits your device.

About

OBJ Viewer

Features
Read full description

Easily open and inspect 3D files directly on your device. Designed for speed and clarity, this 3D file viewer lets you preview models, check geometry, and view parts in clean real-time 3D. Core Features: • Smooth orbit, pan, and zoom controls • Exploded part separation slider • Wireframe and solid mesh rendering modes • Studio lighting and environment presets • Support for .usdz and .obj formats • High-resolution snapshot capture and sharing Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shotexstudio.com/3d-model-viewer-obj-usdz-dae/

Screenshots

BastionChat4 screens
OBJ Viewer3 screens

Verdict

The call

The clearest difference is price: OBJ Viewer at Free against BastionChat's $4.99. OBJ Viewer also leads on update cadence (every 6 days vs every 4 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

OBJ Viewer is free to download; BastionChat costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

BastionChat ships an update every 4 months, OBJ Viewer every 6 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard2 real differences Ā· 4 level
BastionChat versus OBJ Viewer: the parameters behind the verdict, then further details
ParameterBastionChatOBJ Viewer
Price$4.99Free — better
Update frequencyEvery 4 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.017.6 — better
Further details — not scored
Size79 MB1 MB
Age rating4+12+
DeveloperFrederic Ayala HeinrichShota Sukhiashvili

In-app purchases

None

BastionChat

No in-app purchases

None

OBJ Viewer

No in-app purchases

Questions

Is BastionChat free?
BastionChat costs $4.99, with no in-app purchases.
Is OBJ Viewer free?
OBJ Viewer is free to download, with no in-app purchases.
Do BastionChat or OBJ Viewer have ads?
Neither BastionChat nor OBJ Viewer shows ads.
Which is updated more often, BastionChat or OBJ Viewer?
BastionChat ships an update every 4 months, and OBJ Viewer every 6 days. Most recently, BastionChat was updated on October 23, 2026 and OBJ Viewer on October 25, 2026.

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