Sentai vs Open
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sentai
This voice-enabled digital companion offers AI-powered natural conversation to support users in their homes, helping them adhere to daily routines and maintain independence. It also provides a companion app for carers to configure the device, monitor activity, and receive alerts for potential issues.
- AI-powered natural conversation
- Routine adherence support
- Independence maintenance
- Carer configuration
- Activity and wellbeing insights
- Shopping lists and care notes
- Issue-based notifications
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Sentai is a voice-enabled digital companion for those in need of some extra support in their own home. It offers AI-powered natural conversation, helping adhere to daily routines and maintain independence. The Sentai app for carers, friends and family enables easy configuration of the Sentai speaker and provides AI-powered insight into a user’s activity and wellbeing along with chat, shopping lists and care notes. Carers and family members can receive notifications when there are issues, for example when medication has run out, urgent shopping is needed, or no movement has been detected for a while.
Open
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Open-OH: supporting you on your journey with Long Covid, Fibromyalgia, ME/CFS and more. Track your symptoms, and engage with resources to help you increase your functional capacity and make informed decisions about your condition and occupation DIARIES Track your activity levels, sleep, meals, symptoms and more ASSESSMENTS Access industry standard, condition specific Patient Reported Outcome Measures (PROMs) RESOURCES Receive personalised suggestions to access lots of support resources to educate and guide you on your journey with your long term conditions. Including symptoms specific resources, financial guides, and advice for your manager or employer. FIND SUPPORT Find local services to support your journey
Screenshots
Verdict
The clearest difference is update cadence: Open at every 2 weeks against Sentai's every 6 weeks. On price, ads, in-app purchases and device support 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.
Sentai ships an update every 6 weeks, Open every 2 weeks. The most recent releases landed on September 16, 2026 and September 6, 2026 respectively.
| Parameter | Sentai | Open |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 60 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Sentai | Elaros |
In-app purchases
Sentai
No in-app purchases
Open
No in-app purchases
