Pen and Paper vs SalmonBytes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pen and Paper
Create handwritten notes and drawings, annotate PDFs, and add text and shapes. Zoom in for detailed editing, organize content with layers, and import custom fonts and page styles. Share your creations as PDFs or JPEGs.
- Handwritten notes and drawings
- PDF import and annotation
- Text and shape insertion
- Zoom and split view
- Layer management
- Custom font installation
- PDF export
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Pen and Paper is perfect for hand-written notes on your iPad or iPhone. You can even import and write on PDFs. INK Draw ink with your finger. Resize, recolor, and move your doodles. TEXT Add text and text boxes. Change alignment, fonts, color, and install additional fonts. Perfect for adding comments to PDF. SHAPES Add geometric primitives, arrows, curves, and polygons Use the built in diagram elements and arrows to create diagrams. Create clip art of portions that you wish to reuse. shapes can be colored using gradients and fill with patterns. Use "rough" outline to make it look more like a drawing. ZOOM AND SPLIT VIEW Zoom more than 10 times to edit and draw even tiny details. Use split view (iPad only) to see full page view or look at another page PHOTOS Include photos. You can crop and rotate photos. BOOKMARKS Add bookmarks to navigate in your documents PDF SUPPORT AND SLIDE NOTES Import and annotate PDFs from other apps or Files. Use any of the built-in "Slide Note" templates to annotate presentations. When you are done export as PDF again. Use the "clone" tool to copy a portion a PDF and marker to mark text in the PDF for easy search. SHARING To share your notes with the world, simply email them as PDF. You can also extract individual pages as JPEG images. LAYERS Use the layer list to organize order of shapes and ink on the page PAGE STYLES Pen and paper comes with a variety of page styles, but you can also create your own. Import a PDF of your favourite page style and store it as a "page style" in the app. ICLOUD SUPPORT Documents, clipart and page styles, can be stored in iCloud. FONTS Are the built-in fonts not interesting enough? Install extra Truetype fonts from sites like FontSquirrel and Blambot within the app. Features: • Layers • Pen tool with color and thickness • Marker tool for marking text in PDFs • Smooth pan and zoom • Split-view to see two parts of your documents at the same time • Bookmarks and search • Insert text, arrows, photos, rectangles, circles and polygons easily • Fill shapes with gradients and patterns • Area selection, for moving and resizing large areas of your note • Built-in icon library • PDF import and export (email or other accounts) • Install additional fonts (Truetype) • Various page styles and add your own. • Fullscreen mode • iCloud support SUBSCRIPTION Subscription removes watermark (on export) and enables lasso tool. All other features are part of free version. TERMS OF USE (EULA) Uses Apple's standard terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SalmonBytes
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SalmonBytes brings the scattered public data of Chilean salmon farming into a single app and turns it into something you can actually consult in the field, even with no signal. Built for site managers, health and environmental teams, consultants, inspectors, suppliers and researchers who currently lose hours cross-checking spreadsheets, portals and rulings. FREE MODULES FARM SITE MAP Mapping of aquaculture concessions and Salmon Concession Groups (ACS) with real polygons, location, operator and status. Search by site, RNA code, company or ACS. It also includes the freshwater hatcheries listed in the National Aquaculture Registry, with their own show/hide toggle and a detail sheet covering operator, municipality, region, water body and authorised species. SANITARY FALLOWING Visual fallowing calendar by ACS, rivers and lakes included. See at a glance which neighbourhoods are fallowing, which are in production and until when. VETERINARY DRUG DIRECTORY Registered veterinary pharmaceutical products: active ingredient, sale conditions, withdrawal period, target species and presentations. PREMIUM MODULES HEALTH, PRODUCTION AND ENVIRONMENT Dashboards for antimicrobial and antiparasitic treatments, mortality, stocking, harvests, biomass and escapes, with comparisons by cycle, region and company. REGIONAL PULSE Weekly surveillance for the Los Lagos, Aysén and Magallanes regions using endemic corridor charts: each week is compared against the range it occupied in previous years. Mortality by cause, sea lice and production by species. ENVIRONMENTAL AND OCEANOGRAPHIC Readings from the IFOP buoy network: temperature, oxygen and algal blooms, with trends and risk indices by concession group. COMING SOON The Regulatory and Scientific modules appear on the home screen marked as coming soon and are not available yet. WHERE THE DATA COMES FROM All information comes from public Chilean government sources: - SAG: registry of veterinary pharmaceutical products. - SERNAPESCA: aquaculture transparency releases, sanitary fallowing, stocking, harvests, mortality, treatments, escapes and the National Aquaculture Registry. - SUBPESCA: aquaculture concessions and technical records. - SMA and SNIFA: inspections and sanctioning procedures. - IFOP: oceanographic buoy network. We complement these sources with freedom-of-information requests under Chile's Transparency Act (Law 20.285), which lets us include records that are not always published in a consultable format. Everything is processed and refreshed periodically. WORKS OFFLINE After the initial sync, the information stays on your device in an encrypted database. You can consult maps, fallowing calendars and site records at farm sites, on vessels or in areas with no coverage. TRIAL AND PRICING The download and the Farm Site Map, Sanitary Fallowing and Veterinary Drug Directory modules are free, with no time limit. Premium modules include a 7-day free trial: billing starts only when the trial ends, and you can cancel beforehand from Settings > Apple ID > Subscriptions. SUBSCRIPTION SalmonBytes Premium — Monthly · 1 month · $14,990 CLP SalmonBytes Premium — Yearly · 1 year · $149,900 CLP Payment is charged to your Apple account when you confirm the purchase. The subscription renews automatically unless you cancel at least 24 hours before the end of the period. You can manage or cancel it in Settings > Apple ID > Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://servidor-salmonicultura.onrender.com/privacy SalmonBytes is an independent product, not affiliated with SAG, Sernapesca, Subpesca, the Environmental Superintendence or IFOP. The information is provided to support day-to-day work and does not replace official sources or binding administrative acts.
Screenshots
Verdict
The clearest difference is update cadence: SalmonBytes at every 2 weeks against Pen and Paper's every 5 weeks. Pen and Paper's advantage is device support (4 vs 2). On price, ads, in-app purchases 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
Both are free to download. Pen and Paper sells 3 in-app purchases, starting at $0.99 per month and SalmonBytes sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.
Pen and Paper ships an update every 5 weeks, SalmonBytes every 2 weeks. Both last shipped on October 15, 2026.
| Parameter | Pen and Paper | SalmonBytes |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (41 ratings) — better | — |
| Positive reviews | 69.7% of reviews | — |
| Number of ratings | 41 — better | — |
| Update frequency | Every 5 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15 — better | 16.0 |
| Further details — not scored | ||
| Size | 50 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | Vivid Apps | Patricio Pena |
In-app purchases
Pen and Paper
- Pen and Paper PRO monthly$0.991 Month
- Pen and Paper PRO$5.991 Year
- Pen and Paper PRO$7.99
SalmonBytes
- SalmonBytes Premium Mensual$12.991 Month
- SalmonBytes Premium Anual1 Year trial$129.991 Year









