# Doona vs Sereniby

The clearest difference is review sentiment: Sereniby at 50% against Doona's 0%. Sereniby also leads on rating (3.8 vs 2.5) and update cadence (every 3 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sereniby holds the better App Store score, 3.8 against 2.5. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 0% of Doona's written reviews are positive against 50% of Sereniby's.

Doona ships an update every 2 months, Sereniby every 3 weeks. The most recent releases landed on September 10, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Doona | Sereniby |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/doona/id6444283141/reviews) | **[3.8 (5 ratings)](https://appshunter.io/ios/app/sereniby/id6569216382/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 87 MB | 116 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Doona™ Parenting Made Simple](https://appshunter.io/developer/1653569879) | [Sereniby, Inc.](https://appshunter.io/developer/1758798147) |

## What reviewers say

### Doona

[App page](https://appshunter.io/ios/app/doona/id6444283141)

This app connects to a car seat alert system to notify parents if a child is left unattended. It features three levels of alarms and can contact emergency contacts if alerts are not acknowledged. The system aims to prevent accidental heatstroke by ensuring children are not left alone in vehicles.

**Highlights:** Child presence detection, Three alert levels, Emergency contact notification, Connects to SensAlert device, Parental safety monitoring

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sereniby

[App page](https://appshunter.io/ios/app/sereniby/id6569216382)

Control your smart air purifier remotely, monitor your baby's room environment in real-time, and receive maintenance alerts. Optimize air quality and comfort with customizable schedules and automatic adjustments for a safe and healthy space.

**Highlights:** Remote smart purifier control, Real-time air quality monitoring, Customizable schedules, Automatic purification adjustments, Maintenance reminders and filter ordering

**In-app purchases:** none


## Frequently asked questions

### Is Doona free?

Doona is free to download, with no in-app purchases.

### Is Sereniby free?

Sereniby is free to download, with no in-app purchases.

### Which has better reviews, Doona or Sereniby?

Sereniby is rated higher. Doona averages 2.5 out of 5 from 2 ratings, while Sereniby averages 3.8 from 5 ratings.

### Do Doona or Sereniby have ads?

Neither Doona nor Sereniby shows ads.

### Which is updated more often, Doona or Sereniby?

Doona ships an update every 2 months, and Sereniby every 3 weeks. Most recently, Doona was updated on September 10, 2026 and Sereniby on June 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*