# Iddera vs Hydra OS

The clearest difference is update cadence: Iddera at every 2 weeks against Hydra OS's every 2 months. Hydra OS's advantage is iOS requirement (12.0 vs 15.0). 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.

Iddera ships an update every 2 weeks, Hydra OS every 2 months. The most recent releases landed on October 5, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Iddera | Hydra OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/iddera/id6450647702/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 152 MB | 52 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [IDDERA LIFE LTD](https://appshunter.io/developer/1694210305) | [Afrihealth LTD](https://appshunter.io/developer/1536533770) |

## What reviewers say

### Iddera

[App page](https://appshunter.io/ios/app/iddera/id6450647702)

Connect with licensed primary care doctors instantly, 24/7, for health questions, prescriptions, and referrals. Receive personalized wellness plans and follow-ups to manage your health effectively.

**Highlights:** Instant doctor messaging 24/7, Prescriptions and medical referrals, Daily health and wellness actions, Treatment follow-ups, Personalized meal and fitness plans

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydra OS

[App page](https://appshunter.io/ios/app/hydra-os/id6479909238)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Iddera free?

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

### Is Hydra OS free?

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

### Do Iddera or Hydra OS have ads?

Neither Iddera nor Hydra OS shows ads.

### Which is updated more often, Iddera or Hydra OS?

Iddera ships an update every 2 weeks, and Hydra OS every 2 months. Most recently, Iddera was updated on October 5, 2026 and Hydra OS on October 19, 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.*