Master Key vs MedicAir
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Master Key
This app provides secure two-factor authentication using a time-based one-time password algorithm. It helps you maintain access to your online services, like email and social media, directly from your device.
- Two-factor authentication
- Time-based one-time password algorithm
- Secure access to online services
- Simple and safe to use
- Mobile access to accounts
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Master Key – secure and safe yet simple two-factor authentication app, which uses a time-based one-time password algorithm. Keep access to all your favourite online services, such as Gmail and Facebook, in your hands (and just your hands!) at all times.
MedicAir
This app provides a medical-grade air purification solution for businesses. It effectively removes pollutants, bacteria, and viruses from indoor environments, ensuring cleaner air for staff and visitors.
- Medical-grade air purification
- Removes pollutants, bacteria, and viruses
- Over 5000 air inlets
- 360º clean air dispersion
- Reassures staff and customers
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MedicAir is a unique air purification solution for your business designed to reassure your staff, customers and visitors with medical grade clean air technology. MedicAir draws in pollutants, bacteria and viruses using over 5000 inlets before sanitising and dispersing clean air 360º accross the room.
Screenshots
Verdict
The clearest difference is rating: MedicAir at 5.0 against Master Key's 3.0. On price, ratings volume, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MedicAir holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Master Key ships an update every 34 months, MedicAir every 21 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | Master Key | MedicAir |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | — | 60.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 34 months | Every 21 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 42 MB | 172 MB |
| Age rating | 4+ | 4+ |
| Developer | EQ Club UK Ltd | MedicAir DentAir Ltd |
Customer experience
Master Key
MedicAir
In-app purchases
Master Key
No in-app purchases
MedicAir
No in-app purchases
