1byone Relief vs PSMailbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1byone Relief
This application works with a specific hardware device to manage TENS therapy. It allows users to control vibration frequencies and track treatment data for pain relief.
- Control vibration frequency
- Record treatment data
- Manage TENS therapy device
- Pain relief tracking
- Hardware integration
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1byone Relief is an app control hardware device, it is combined with 1byone Electronic TENS Therapy Pain Relief Kit to regulate frequency vibration and record the treatment data. 1byone Relief, happy and healthy!
PSMailbox
Access your secure email, cloud storage, and calendar from a single application. Enjoy the full functionality of your PSMail.net account on your mobile devices.
- Secure email access
- Cloud storage integration
- Calendar management
- Online account access
- Mobile functionality
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PSMailbox provides secure and online access to your PSMail.net account with all the features of secure email, cloud storage and calendar.
Screenshots
Verdict
The clearest difference is review sentiment: 1byone Relief at 25% against PSMailbox's 0%. 1byone Relief also leads on iOS requirement (8.0 vs 14.2). PSMailbox's advantage is rating (3.5 vs 3.3). 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.
PSMailbox holds the better App Store score, 3.5 against 3.3. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews complicate that: 25% of 1byone Relief's written reviews are positive against 0% of PSMailbox's, so the app with the better star average is not the one people write more warmly about.
1byone Relief ships an update every 5 weeks, PSMailbox every 2 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.
| Parameter | 1byone Relief | PSMailbox |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (3 ratings) | 3.5 (4 ratings) — better |
| Positive reviews | 25.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 | 4 — better |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 14.2 |
| Further details — not scored | ||
| Size | 6 MB | 42 MB |
| Age rating | 12+ | 4+ |
| Developer | JKH HEALTH CO., LTD. | Argonaut Quality Systems Inc. |
Customer experience
1byone Relief
PSMailbox
In-app purchases
1byone Relief
No in-app purchases
PSMailbox
No in-app purchases
Questions
Is 1byone Relief free?
Is PSMailbox free?
Which has better reviews, 1byone Relief or PSMailbox?
Do 1byone Relief or PSMailbox have ads?
Which is updated more often, 1byone Relief or PSMailbox?
Other comparisons
