Comparison

STL Viewer vs Ego Chat

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

Head to head
About

STL Viewer

View, explore, and edit 3D models on your iPhone or iPad. Basic viewing is included with purchase, with optional upgrades for advanced creation, editing, and reporting features. Models are processed locally for privacy.

Highlights
  • Open and view STL files
  • Rotate, pan, and zoom models
  • Basic model information inspection
  • Create and edit 3D models
  • Measure distances and angles
  • Export to multiple file formats
  • Generate local PDF reports
Features
Read full description

Open your STL file on iPhone or iPad and examine the model with rotation, zoom and technical views. Your app purchase includes basic viewing without a subscription. Pro and Studio are optional upgrades for creation, editing, inspection and reports. BASIC VIEWER Open binary or ASCII STL files. Orbit, pan and zoom, switch camera views, and inspect basic model information in solid or wireframe mode. PRO WORKSPACE Build with primitives and profiles; extrude and revolve shapes. Transform objects, preview Boolean operations and plane cuts, and use mesh repair tools. Organize multiple objects in local projects with undo, redo and saved revisions. Measure distances, angles and radii, and inspect sampled estimates of wall thickness and surface deviation. Export STL, OBJ, PLY, 3MF and GLB files, capture PNG images, and opt into project reminders. STUDIO REPORTS Studio includes Pro and adds local PDF reports with project information, geometry summaries and inspection annotations. IMPORTANT LIMITS Models are processed on your device, not uploaded to our servers. Projects and revisions are local. This app does not include cloud collaboration, SSO, STEP/B-rep CAD or manufacturing certification. Thickness and surface comparisons are sampled estimates, not certified measurements. File formats and mesh operations have safety limits and restrictions shown in the tools. STL does not record units; choose the correct unit for your model. OPTIONAL PLANS The app download is paid. Basic viewing needs no subscription. Creation, editing and advanced inspection require Pro or Studio; PDF reports require Studio. Monthly/annual subscriptions and Pro Lifetime are optional. The App Store displays prices and periods before purchase. Subscriptions renew automatically until cancelled in your Apple account settings. Restore Purchases is available in the app. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://softwareideal.com.br/policy.html Support: https://softwareideal.com.br

About

Ego Chat

Features
Read full description

Ego Chat is an AI chat app that runs directly on your iPhone without sending your conversations to a cloud server by default. LOCAL-FIRST BY DEFAULT Download a GGUF model, chat offline, and keep history on your device. Built for privacy and trips without connectivity. PICK THE RIGHT MODEL Browse a catalogue (Hugging Face), see size, quantization, and a compatibility estimate based on your iPhone’s RAM. Gemma, Llama, Qwen, and more. MULTIMODAL Attach photos, files, or documents when your model supports it (vision). MEMORY & SEARCH (OPTIONAL) Save useful facts to personalize answers. Turn on web search (SearXNG, Tavily or Brave) with your own API key. REMOTE SERVER (OPTIONAL) Connect LM Studio, Ollama, or an OpenAI-compatible API on your PC over Wi‑Fi / Tailscale for larger models, still under your control. Ego Chat : your AI, on your phone.

Screenshots

STL Viewer2 screens
Ego Chat4 screens

Verdict

The call

The clearest difference is price: Ego Chat at Free against STL Viewer's $0.99. Ego Chat also leads on in-app purchases (none vs 5) and update cadence (every 4 days vs every 4 weeks). On ads 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

Ego Chat is free to download; STL Viewer costs $0.99 up front. STL Viewer sells 5 in-app purchases, starting at $2.99 per month. Ego Chat asks for nothing beyond the download.

UpkeepUpdate frequency

STL Viewer ships an update every 4 weeks, Ego Chat every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
STL Viewer versus Ego Chat: the parameters behind the verdict, then further details
ParameterSTL ViewerEgo Chat
Price$0.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size5 MB36 MB
Age rating4+9+
DeveloperFelipe Marques de BarrosEthan Ratnarajah

In-app purchases

5 purchases

STL Viewer

Subscriptions4
  • STL Viewer Pro Mensal$2.991 Month
  • STL Viewer Studio Mensal$5.991 Month
  • STL Viewer Pro Anual$22.991 Year
Show 1 more
  • STL Viewer Studio Anual$49.991 Year
One-time1
  • STL Viewer Pro Vitalício$39.99
None

Ego Chat

No in-app purchases

Questions

Is STL Viewer free?
STL Viewer costs $0.99, and also offers in-app purchases.
Is Ego Chat free?
Ego Chat is free to download, with no in-app purchases.
Do STL Viewer or Ego Chat have ads?
Neither STL Viewer nor Ego Chat shows ads.
Which is updated more often, STL Viewer or Ego Chat?
STL Viewer ships an update every 4 weeks, and Ego Chat every 4 days. Most recently, STL Viewer was updated on November 3, 2026 and Ego Chat on October 31, 2026.

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