Comparison

Gatekeeper Manager vs PDB Viewer

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

Head to head
About

Gatekeeper Manager

Features
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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.

About

PDB Viewer

Features
Read full description

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 โ€ข RCSB Protein Data Bank โ€” 200,000+ experimentally determined structures โ€ข AlphaFold โ€” 200M+ AI-predicted protein models โ€ข SWISS-MODEL โ€” template-based homology models โ€ข PubChem and ChEMBL โ€” millions of drugs and compounds โ€ข Crystallography Open Database โ€” small-molecule crystals โ€ข 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 โ€ข Five representations: wireframe, ball-and-stick, space-filling (CPK), cartoon/ribbon, and a smooth molecular surface โ€ข Color by element, chain, secondary structure, rainbow, or AlphaFold confidence (pLDDT) โ€ข Biological assemblies: rebuild an entire icosahedral virus capsid from a few deposited chains โ€ข NMR ensembles: overlay every model in the bundle to watch a protein flex โ€ข Automatic secondary-structure detection MADE FOR TOUCH โ€ข Rotate, pinch-zoom, and pan with smooth native rendering โ€ข Tap any atom to see its element, residue, and chain โ€ข 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

Gatekeeper Manager4 screens
PDB Viewer4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. PDB Viewer sells 1 one-off in-app purchase. Gatekeeper Manager asks for nothing beyond the download.

UpkeepUpdate frequency

Gatekeeper Manager ships an update every 16 months, PDB Viewer every 3 weeks. Both last shipped on September 10, 2026.

Scorecard3 real differences ยท 3 level
Gatekeeper Manager versus PDB Viewer: the parameters behind the verdict, then further details
ParameterGatekeeper ManagerPDB Viewer
PriceFreeFree
Update frequencyEvery 16 monthsEvery 3 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.0 โ€” better16.0
Further details โ€” not scored
Size23 MB2 MB
Age rating4++4
DeveloperRobby BalonaQvyshift LLC

In-app purchases

None

Gatekeeper Manager

No in-app purchases

1 purchases

PDB Viewer

One-time1
  • PDB Viewer Pro$9.99

Questions

Is Gatekeeper Manager free?
Gatekeeper Manager is free to download, with no in-app purchases.
Is PDB Viewer free?
PDB Viewer is free to download, with in-app purchases available.
Do Gatekeeper Manager or PDB Viewer have ads?
Neither Gatekeeper Manager nor PDB Viewer shows ads.
Which is updated more often, Gatekeeper Manager or PDB Viewer?
Gatekeeper Manager ships an update every 16 months, and PDB Viewer every 3 weeks. Most recently, Gatekeeper Manager was updated on September 10, 2026 and PDB Viewer on September 10, 2026.

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