Gatekeeper Manager vs PDB Viewer
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Gatekeeper Manager
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Gate keeper is used to open and close your gate using a missed call from your cell phone. If your number is recognised on the captured schedule, the gate will open when you dial it. the call costs you nothing, nada, niks! Any gate or garage door motor can have a gate-keeper fitted to it. An added bonus is that you can get email alerts of who is opening your gate. Our intuitive internet web based scheduling allows you to configure up to 1000 numbers.
PDB Viewer
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PDB Viewer turns your phone into a molecular microscope. Search the entire Protein Data Bank and over 200 million AlphaFold predictions, then explore any protein, virus, drug, or DNA structure in interactive 3D โ free, with no account, no ads, and no sign-up. WHERE THE MOLECULES COME FROM โข RCSB Protein Data Bank โ 200,000+ experimentally determined structures โข AlphaFold โ 200M+ AI-predicted protein models โข SWISS-MODEL โ template-based homology models โข PubChem and ChEMBL โ millions of drugs and compounds โข Crystallography Open Database โ small-molecule crystals โข NCI/CADD resolver โ type a chemical name and get a 3D model Every source is free and needs no API key. You can also open your own .pdb and .cif files. WAYS TO SEE IT โข Five representations: wireframe, ball-and-stick, space-filling (CPK), cartoon/ribbon, and a smooth molecular surface โข Color by element, chain, secondary structure, rainbow, or AlphaFold confidence (pLDDT) โข Biological assemblies: rebuild an entire icosahedral virus capsid from a few deposited chains โข NMR ensembles: overlay every model in the bundle to watch a protein flex โข Automatic secondary-structure detection MADE FOR TOUCH โข Rotate, pinch-zoom, and pan with smooth native rendering โข Tap any atom to see its element, residue, and chain โข Recently viewed structures are cached, so they reopen instantly and work offline For students, researchers, teachers, and the simply curious. PDB Viewer makes structural biology beautiful and accessible. Structures are provided by their respective databases. PDB Viewer is independent and not affiliated with or endorsed by the RCSB PDB, EMBL-EBI, or AlphaFold.
Screenshots
Verdict
The clearest difference is in-app purchases: Gatekeeper Manager at none against PDB Viewer's 1. Gatekeeper Manager also leads on iOS requirement (14.0 vs 16.0). PDB Viewer's advantage is update cadence (every 3 weeks vs every 16 months). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. PDB Viewer sells 1 one-off in-app purchase. Gatekeeper Manager asks for nothing beyond the download.
Gatekeeper Manager ships an update every 16 months, PDB Viewer every 3 weeks. Both last shipped on September 10, 2026.
| Parameter | Gatekeeper Manager | PDB Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 16 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.0 โ better | 16.0 |
| Further details โ not scored | ||
| Size | 23 MB | 2 MB |
| Age rating | 4+ | +4 |
| Developer | Robby Balona | Qvyshift LLC |
In-app purchases
Gatekeeper Manager
No in-app purchases
PDB Viewer
- PDB Viewer Pro$9.99





