Solus vs Bastion Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solus
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Access doors using virtual card interface.
Bastion Key
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Bastion turns your phone into the keys for your building. If your housing provider or site manager has issued you a digital key, register it once and hold your phone to the lock to open the door. No extra hardware, no card to carry. - Register a key from the invite you receive, in a couple of taps. - Open compatible locks by holding your phone to them over NFC. Opening works offline. - See the keys you hold and when they expire. - Clear guidance when something needs attention, such as a key that needs syncing. Keys are issued and managed by your housing or locking system provider. Bastion does not require an account or password.
Screenshots
Verdict
Solus and Bastion Key are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 22, 2026 and October 24, 2026 respectively.
| Parameter | Solus | Bastion Key |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 38 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | A G Suresh | Bastion Dynamics Ltd |
In-app purchases
Solus
No in-app purchases
Bastion Key
No in-app purchases
