SimTunnel Pro vs PDF Scanner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimTunnel Pro
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SimTunnel Pro is designed to perform a quick tunnel analysis on your phone device. SimTunnel Pro is very simple and easy to use. SimTunnel Pro uses "rock-support interaction" or "convergence-confinement" method to estimate the deformation of circular tunnels in weak rock, and visualizing the tunnel interaction with various support systems. SimTunnel Pro has the following features: - SimTunnel Pro determines Factor of Safety (FOS) as the ratio of maximum support pressure to the support pressure required for equilibrium. - The Tunnel and Rock Parameters dialog allows you to define the tunnel and rock properties for model. - The Strength Properties which are required will depend on the strength criteria you have selected in Setting Page. - Both Mohr-Coulomb and Hoek-Brown strength criteria are available. - The parameter calculator dialogs are available to help you to calculate some of the parameters (i.e. GSI, mi, D, UCS, insitu stress and etc). - The support parameters dialog allows you to easily add support and define the support properties for the model. - Three different support types can be added to the model: Rockbolts, Steelsets and Shotcrete - The ground reaction curve (GRC) is always displayed in the output page. - The brief summary of analysis results and input data will be displayed in the Output Page. - The report button, allows you to save the current model’s input and output information into PDF file. The generated report file can be sent out via email.
PDF Scanner
Transform your mobile device into a powerful document scanner. Easily digitize paper documents into high-quality PDF files with automatic detection, perspective correction, and color enhancements. Organize and share your scans with ease.
- Convert paper to multi-page PDFs
- Automatic document detection
- Perspective correction
- Organize scans with tags
- Share documents easily
- High-resolution scans up to 300 dpi
- Import photos from gallery
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Transform your iPhone and iPad into powerful document scanners with PDF Scanner. In just a few taps, digitize your paper documents into sharp, clean PDF files. PDF Scanner automatically detects and captures documents, applying perspective correction and color enhancements for high-quality results. Key Features At A Glance: • CREATE PDFs: ∙ Easily convert paper documents into multi-page PDF files. ∙ Automatic document detection. ∙ Enhanced with perspective correction. • FILE MANAGEMENT: ∙ Organize your scans and label them with colorful tags. • SHARE YOUR SCANS: ∙ Easily share documents with friends or co-workers. • AND MUCH MORE... Premium Features: • UNLIMITED PAGES: ∙ No limit on pages and file size of your scans. • DOCUMENT FORMAT: ∙ Choose from document sizes like US Letter, US Legal, A3, A4, A5, and more. • HIGH-RESOLUTION SCANS: ∙ Create up to 300 dpi high-resolution documents. • AUTO-ENHANCE: ∙ Automatically enhance scan quality and color. • COLOR FILTERS: ∙ Apply Black & White or grayscale filters to your scans. • PHOTO IMPORT: ∙ Import images from the Photos app. • AUTOMATIC CAPTURE: ∙ Automatically detects and scans a document. A monthly or annual subscription is required to get access to all premium features. --- Subscribe monthly or annually to access all premium features. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Monthly plans at $0.99 USD and yearly at $9.99 USD (prices may vary outside the U.S.). Charges apply to your AppStore Account at purchase confirmation. Manage or cancel your subscription anytime in your AppStore Account Settings. Terms of Use: https://pdf-pro.net/terms-of-service/ Privacy Policy: https://pdf-pro.net/privacy-policy/
Screenshots
Verdict
The clearest difference is price: PDF Scanner at Free against SimTunnel Pro's $1.99. PDF Scanner also leads on update cadence (every 2 months vs every 39 months). SimTunnel Pro's advantage is in-app purchases (none vs 4). On ads, device support and iOS requirement 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
PDF Scanner is free to download; SimTunnel Pro costs $1.99 up front. PDF Scanner sells 4 in-app purchases, starting at $0.99 per month. SimTunnel Pro asks for nothing beyond the download.
SimTunnel Pro ships an update every 39 months, PDF Scanner every 2 months. The most recent releases landed on October 3, 2026 and September 23, 2026 respectively.
| Parameter | SimTunnel Pro | PDF Scanner |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 4.6 (45 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 45 — better |
| Update frequency | Every 39 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Roozbeh Geraili Mikola | Dominic Rodemer |
In-app purchases
SimTunnel Pro
No in-app purchases
PDF Scanner
- PDF Scanner Offer - Monthly3 Days trial$0.991 Month
- PDF Scanner - Monthly3 Days trial$1.991 Month
- PDF Scanner Offer - Annual3 Days trial$8.991 Year
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- PDF Scanner - Annual3 Days trial$14.991 Year
Questions
Is SimTunnel Pro free?
Is PDF Scanner free?
Do SimTunnel Pro or PDF Scanner have ads?
Which is updated more often, SimTunnel Pro or PDF Scanner?
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