Comparison

STL Viewer vs TreeNotes

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

TreeNotes

Features
Read full description

TreeNotes is a simple, beautiful note app that lets you organize your thoughts as a tree. Break big ideas into smaller ones by adding child notes, then expand or collapse branches to focus on what matters. Group related notes into colorful boards and rearrange everything with a simple drag. FEATURES • Tree-structured notes — add child notes to build an outline • Expand and collapse branches to stay focused • Colorful boards to group your notes by topic • Drag to reorder notes and boards • Swipe to delete, with one-tap undo • Works completely offline — your notes stay on your device • Light and dark mode • Clean, distraction-free design Whether you are planning a project, taking study notes, drafting ideas, or making nested to-do lists, TreeNotes keeps your thinking clear and organized. Download TreeNotes and start organizing your ideas today.

Screenshots

STL Viewer2 screens
TreeNotes4 screens

Verdict

The call

The clearest difference is price: TreeNotes at Free against STL Viewer's $0.99. TreeNotes also leads on iOS requirement (15.6 vs 17.0). STL Viewer's advantage is ads (none vs shown). On update cadence, 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

TreeNotes is free to download; STL Viewer costs $0.99 up front. STL Viewer sells 5 in-app purchases, starting at $2.99 per month and TreeNotes sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

STL Viewer ships an update every 4 weeks, TreeNotes every 2 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
STL Viewer versus TreeNotes: the parameters behind the verdict, then further details
ParameterSTL ViewerTreeNotes
Price$0.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size5 MB34 MB
Age rating4+4+
DeveloperFelipe Marques de BarrosSeiya.k

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
1 purchases

TreeNotes

One-time1
  • Premium$2.99

Questions

Is STL Viewer free?
STL Viewer costs $0.99, and also offers in-app purchases.
Is TreeNotes free?
TreeNotes is free to download, with in-app purchases available.
Do STL Viewer or TreeNotes have ads?
TreeNotes shows ads; STL Viewer does not.
Which is updated more often, STL Viewer or TreeNotes?
STL Viewer ships an update every 4 weeks, and TreeNotes every 2 weeks. Most recently, STL Viewer was updated on November 7, 2026 and TreeNotes on October 30, 2026.

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