# Nautilus Research vs Predictions.io

The clearest difference is in-app purchases: Predictions.io at none against Nautilus Research's 2. Nautilus Research's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Nautilus Research sells 2 in-app purchases, starting at $199.00 per month. Predictions.io asks for nothing beyond the download.

Nautilus Research ships an update every 6 days, Predictions.io every 9 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Nautilus Research | Predictions.io |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 9 days |
| Size | 21 MB | 48 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Nautilus Capital LLC](https://appshunter.io/developer/1704220819) | [questimations.com](https://appshunter.io/developer/1895354525) |

## What reviewers say

### Nautilus Research

[App page](https://appshunter.io/ios/app/nautilus-research/id6463294849)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Membership | $199.00 | per month |
| Do Not Purchase(Legacy) | $199.00 | per month |


### Predictions.io

[App page](https://appshunter.io/ios/app/predictionsio/id6763520046)

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

**In-app purchases:** none


## Frequently asked questions

### Is Nautilus Research free?

Nautilus Research is free to download, with in-app purchases available.

### Is Predictions.io free?

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

### Do Nautilus Research or Predictions.io have ads?

Neither Nautilus Research nor Predictions.io shows ads.

### Which is updated more often, Nautilus Research or Predictions.io?

Nautilus Research ships an update every 6 days, and Predictions.io every 9 days. Most recently, Nautilus Research was updated on October 30, 2026 and Predictions.io on October 25, 2026.

---

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