Comparison

STL Viewer vs Call Scheduler

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

Call Scheduler

Never forget important phone calls again. This app provides timely reminders for scheduled calls, allowing you to initiate the call with a single tap. It helps manage callbacks, appointment confirmations, and daily important calls.

Highlights
  • Schedule phone calls with reminders
  • Initiate calls with a single tap
  • Select numbers from contacts
  • Edit and manage scheduled calls
  • Simple call preparation screen
  • Call history (Pro version)
  • Reusable call templates (Pro version)
Features
Read full description

The restaurant only takes bookings by phone and the line opens at 10. By 10:15 you have forgotten. Call Scheduler reminds you at the right moment, and one tap on the reminder opens the number ready to dial. Set the date, time and number once. The app does the remembering. This app does not make calls automatically. All calls are started manually by the user. Key Features Call Reminders Schedule phone calls and receive a notification before the scheduled time so you never forget. Tap to Call Open the call preparation screen from the reminder and start dialing with a single tap. Contact Selection Choose phone numbers directly from your iOS contacts for quick scheduling. Edit and Manage Calls Update the date, time, number, or notes for any scheduled call. Simple Call Preparation Screen View the phone number, notes, and scheduled time before placing the call. Use Cases Perfect for situations where you must remember to call someone at a specific time: Business callbacks Appointment confirmations Freelancers managing client calls Daily reminders for important phone calls Elderly users who want help remembering to call Privacy Focused Your scheduled calls are stored locally on your device. Contact access is requested only when you choose to select a number from your contacts. Free Version Up to three active scheduled calls Call reminders Manual call helper Contact import Pro Version Unlimited scheduled calls Ad-free experience Call history Search by phone number or notes Home screen widget for the next scheduled call Reusable call templates Important Notes Call Scheduler does not perform automatic dialing. The app only reminds you and helps you start a call manually using the iPhone dialer. Pricing Free: schedule calls (with a limit), call history, and reusable templates. Call Scheduler Pro (monthly / yearly auto-renewable subscription): removes the scheduling limit and hides ads. Prices are shown in the app. Payment is charged to your Apple ID account and renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fillapps.com/privacy/

Screenshots

STL Viewer2 screens
Call Scheduler3 screens

Verdict

The call

The clearest difference is price: Call Scheduler at Free against STL Viewer's $0.99. Call Scheduler also leads on update cadence (weekly vs every 4 weeks) and iOS requirement (15.6 vs 17.0). STL Viewer's advantage is ads (none vs shown). On rating, ratings volume, 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

Call Scheduler 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 Call Scheduler sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for STL Viewer against 5.0 for Call Scheduler. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

STL Viewer ships an update every 4 weeks, Call Scheduler weekly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
STL Viewer versus Call Scheduler: the parameters behind the verdict, then further details
ParameterSTL ViewerCall Scheduler
Price$0.99Free — better
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 4 weeksWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size5 MB54 MB
Age rating4+4+
DeveloperFelipe Marques de BarrosSeiya.k

Customer experience

STL Viewer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Call Scheduler

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

Call Scheduler

Subscriptions1
  • Pro Yearly Plan$9.991 Year

Questions

Is STL Viewer free?
STL Viewer costs $0.99, and also offers in-app purchases.
Is Call Scheduler free?
Call Scheduler is free to download, with in-app purchases available.
Which has better reviews, STL Viewer or Call Scheduler?
STL Viewer and Call Scheduler are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do STL Viewer or Call Scheduler have ads?
Call Scheduler shows ads; STL Viewer does not.
Which is updated more often, STL Viewer or Call Scheduler?
STL Viewer ships an update every 4 weeks, and Call Scheduler weekly. Most recently, STL Viewer was updated on November 7, 2026 and Call Scheduler on October 31, 2026.

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