Comparison

Protein Sequence Viewer vs Peptendium

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

Head to head
About

Protein Sequence Viewer

Features
Read full description

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 Yeast—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

Peptendium

This app provides an educational platform for understanding peptide science. It features a library of peptide profiles, research summaries, and learning modules to enhance research literacy. It is designed for students and researchers, focusing on educational content rather than medical advice.

Highlights
  • 297 peptide profiles with detailed information
  • Evidence signal to distinguish research maturity
  • Curated research briefs and summaries
  • Daily, weekly, and monthly research snapshots
  • Structured learning modules and lessons
  • Library search, filter, and comparison tools
  • Private notebook for research organization
Read full description

Peptendium is an educational peptide research-literacy app built to help students, researchers, and science-curious learners understand peptide science — not dose it, prescribe it, or use it for treatment decisions. EXPLORE 297 PEPTIDE PROFILES Browse a structured educational library of 297 peptide profiles with sequence information, molecular details, family classifications, evidence context, and clear research summaries. UNDERSTAND THE EVIDENCE Peptendium helps you distinguish early-stage findings from stronger human evidence. Each profile includes an evidence signal designed to show how mature the available research is — not whether a peptide is effective or appropriate for use. RESEARCH BRIEFS Explore curated, rule-based summaries covering mechanisms, evidence, comparisons, and quiz-style learning. Research Briefs are generated from Peptendium’s bundled educational profile data and are designed for research literacy. DAILY RESEARCH HIGHLIGHTS Explore rotating educational research highlights, evidence context, signal matrices, watchlists, and source-quality information designed to support peptide research literacy. PEPTENDIUM ACADEMY Learn through eight structured modules and more than 50 lessons covering peptide foundations, receptor biology, amino acids, sequence concepts, research literacy, and evidence interpretation. LIBRARY AND COMPARISON TOOLS Search and filter the library by name, aliases, category, evidence, and sequence. Compare profiles side by side, open PubMed links, save profiles, and add personal notes. NOTEBOOK Build research collections, save profiles, create notes, track topics, and organize your learning in one private workspace stored on your device. DESIGNED WITH INTEGRITY Peptendium does not provide dosing instructions, protocols, stacks, prescribing, treatment recommendations, diagnosis, cure, prevention, or medical advice. All content is educational and should be independently verified. PEPTENDIUM PRO Free access includes core peptide reference content and educational tools. Peptendium Pro is available as a one-time lifetime unlock and includes premium research briefs, advanced comparison and research tools, Study Mode, expanded notes and export features, and additional research-literacy tools. No recurring subscription is required for the lifetime unlock. Privacy Policy: https://ocoeestudios.com/peptendium/privacy Terms of Use: https://ocoeestudios.com/peptendium/terms

Screenshots

Protein Sequence Viewer4 screens
Peptendium4 screens

Verdict

The call

The clearest difference is in-app purchases: Protein Sequence Viewer at none against Peptendium's 2. Protein Sequence Viewer also leads on update cadence (every 2 days vs monthly) and device support (3 vs 1). Peptendium's advantage is ads (none vs shown). On price 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

Both are free to download. Peptendium sells 2 in-app purchases, starting at $9.99 per month. Protein Sequence Viewer asks for nothing beyond the download.

UpkeepUpdate frequency

Protein Sequence Viewer ships an update every 2 days, Peptendium monthly. The most recent releases landed on October 5, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 5 level
Protein Sequence Viewer versus Peptendium: the parameters behind the verdict, then further details
ParameterProtein Sequence ViewerPeptendium
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 days — betterMonthly
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.4
Further details — not scored
Size25 MB39 MB
Age rating4+12+
DeveloperKazunari SasakiOcoee Studios LLC

In-app purchases

None

Protein Sequence Viewer

No in-app purchases

2 purchases

Peptendium

Subscriptions2
  • Peptendium Pro7 Days trial$9.991 Month
  • Peptendium Pro7 Days trial$79.991 Year

Questions

Is Protein Sequence Viewer free?
Protein Sequence Viewer is free to download, with no in-app purchases.
Is Peptendium free?
Peptendium is free to download, with in-app purchases available.
Do Protein Sequence Viewer or Peptendium have ads?
Protein Sequence Viewer shows ads; Peptendium does not.
Which is updated more often, Protein Sequence Viewer or Peptendium?
Protein Sequence Viewer ships an update every 2 days, and Peptendium monthly. Most recently, Protein Sequence Viewer was updated on October 5, 2026 and Peptendium on October 8, 2026.

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