# Constellation Survey vs Sedna Email

The clearest difference is update cadence: Sedna Email at every 2 months against Constellation Survey's every 6 months. Constellation Survey's advantage is iOS requirement (12.0 vs 16.5). On price, ads, in-app purchases and device support there is nothing between them.

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

Constellation Survey ships an update every 6 months, Sedna Email every 2 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Constellation Survey | Sedna Email |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 21 MB | 49 MB |
| Requires iOS | **12.0** | 16.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CONSTELLATION MARINE SERVICES (L.L.C)](https://appshunter.io/developer/1435147894) | [SEDNA SYSTEMS PTE. LTD.](https://appshunter.io/developer/1467018806) |

## What reviewers say

### Constellation Survey

[App page](https://appshunter.io/ios/app/constellation-survey/id1639057844)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sedna Email

[App page](https://appshunter.io/ios/app/sedna-email/id6752009302)

**In-app purchases:** none


## Frequently asked questions

### Is Constellation Survey free?

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

### Is Sedna Email free?

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

### Do Constellation Survey or Sedna Email have ads?

Neither Constellation Survey nor Sedna Email shows ads.

### Which is updated more often, Constellation Survey or Sedna Email?

Constellation Survey ships an update every 6 months, and Sedna Email every 2 months. Most recently, Constellation Survey was updated on November 7, 2026 and Sedna Email on October 30, 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.*