Comparison

Protein Sequence Viewer vs PlasmidViewer Pro

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

Head to head
About

Protein Sequence Viewer

Features
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Protein Sequence Viewer is an iOS application designed for rapid retrieval of protein sequences (single-letter format) and lengths (amino acids) from UniProtKB/Swiss-Prot (reviewed entries). Simply enter a gene name or UniProt ID (Accession or Entry name) to access the data you need. Key Features: Gene name and UniProt ID search (Swiss-Prot reviewed entries only) Canonical sequence display with isoform switching via dropdown menu Downloadable offline databases for Human, Mouse, Rat, and Yeastβ€”enabling searches without internet connectivity Streamlined interface focused on sequences and lengths One-tap sequence copying to clipboard Data Source: All sequence data is retrieved from UniProt.

About

PlasmidViewer Pro

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PlasmidViewer Pro is a native plasmid viewer and editor for iPhone, iPad and Mac. Explore circular and linear maps, inspect annotated sequences, edit DNA and features, and preview restriction digests in a virtual gel. CLEARER PLASMID MAPS - Circular, linear and annotated-sequence views - Simple, Complete and Publication map styles - Fit-to-window maps, zoom and readable feature labels - Restriction sites, primers, rulers and translations EDIT AND ORGANIZE - Edit sequences and annotations with undo and redo - Work with multiple plasmids in separate tabs - Search and sort your library - Recover unsaved work and undo the latest library deletion - Save to your library or export a separate file RESTRICTION ANALYSIS AND VIRTUAL GELS - Explore restriction enzymes and cut positions - Preview digests with DNA ladders and adjustable gel settings - Save and reopen gel projects - Export gel images as PNG or PDF OPEN AND SHARE Open .dna, GenBank, FASTA and raw DNA sequences. Save editable documents and export sequences for use in other tools. PRIVATE ICLOUD LIBRARY Save plasmids locally and synchronize your library through your own private iCloud account. The app does not require a separate account and does not send your sequences to our servers. TRY THE EXAMPLE FREE Explore the bundled example plasmid before subscribing. Opening and importing your own files, saving to your library and iCloud synchronization require an active PlasmidViewer Pro subscription. SUBSCRIPTIONS Monthly and yearly auto-renewable plans are available. The monthly plan is US$4.99 in the U.S. App Store. Current localized prices and billing periods are shown in the app before purchase. One subscription unlocks Pro on your devices signed in to the same Apple Account. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours before the current period ends. Manage or cancel subscriptions in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.biostudio.app/plasmidviewerpro/privacy/

Screenshots

Protein Sequence Viewer4 screens
PlasmidViewer Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: Protein Sequence Viewer at none against PlasmidViewer Pro's 2. Protein Sequence Viewer also leads on update cadence (every 2 days vs every 4 months) and iOS requirement (13.0 vs 17.0). PlasmidViewer Pro's advantage is ads (none vs shown). On price and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. PlasmidViewer Pro sells 2 in-app purchases, starting at $4.99 per month. Protein Sequence Viewer asks for nothing beyond the download.

UpkeepUpdate frequency

Protein Sequence Viewer ships an update every 2 days, PlasmidViewer Pro every 4 months. The most recent releases landed on November 9, 2026 and November 13, 2026 respectively.

Scorecard4 real differences Β· 2 level
Protein Sequence Viewer versus PlasmidViewer Pro: the parameters behind the verdict, then further details
ParameterProtein Sequence ViewerPlasmidViewer Pro
PriceFreeFree
Update frequencyEvery 2 days β€” betterEvery 4 months
AdsYesNo β€” better
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 β€” better17.0
Further details β€” not scored
Size25 MB7 MB
Age rating4+4+
DeveloperKazunari SasakiMARTIN WILLIAMS

In-app purchases

None

Protein Sequence Viewer

No in-app purchases

2 purchases

PlasmidViewer Pro

Subscriptions2
  • PlasmidViewer Pro (Monthly)$4.991 Month
  • PlasmidViewer Pro (Yearly)$49.991 Year

Questions

Is Protein Sequence Viewer free?
Protein Sequence Viewer is free to download, with no in-app purchases.
Is PlasmidViewer Pro free?
PlasmidViewer Pro is free to download, with in-app purchases available.
Do Protein Sequence Viewer or PlasmidViewer Pro have ads?
Protein Sequence Viewer shows ads; PlasmidViewer Pro does not.
Which is updated more often, Protein Sequence Viewer or PlasmidViewer Pro?
Protein Sequence Viewer ships an update every 2 days, and PlasmidViewer Pro every 4 months. Most recently, Protein Sequence Viewer was updated on November 9, 2026 and PlasmidViewer Pro on November 13, 2026.

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