# Nautilus Plus vs Signa

The clearest difference is in-app purchases: Nautilus Plus at none against Signa's 2. Signa's advantage is update cadence (every 2 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Signa sells 2 in-app purchases, starting at $4.99 per month. Nautilus Plus asks for nothing beyond the download.

Nautilus Plus ships an update every 5 weeks, Signa every 2 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Nautilus Plus | Signa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (8 ratings)](https://appshunter.io/ios/app/nautilus-plus/id1321627621/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 23.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 62 MB | 57 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Nautilus Plus](https://appshunter.io/developer/1321627620) | [Signa Athletics Inc](https://appshunter.io/developer/6808801452) |

## What reviewers say

### Nautilus Plus

[App page](https://appshunter.io/ios/app/nautilus-plus/id1321627621)

Manage your gym membership, track workouts, and access personalized fitness and nutrition plans. View schedules, book appointments, and sync data from various fitness trackers. Stay connected with trainers and nutritionists through integrated messaging.

**Highlights:** Virtual membership card, Workout tracking and program access, Sync data from fitness trackers, Nutrition plan and tools, Group exercise class schedules, Appointment booking, Integrated messaging with trainers

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use (sometimes)
- 👍 Good gym experience
- 👍 Professional service
- 👍 Useful for booking classes
- 👍 Useful for checking Boomerang points

**What reviewers complain about**

- 🐛 App frequently crashes
- 🐛 Login issues
- 🐛 Server errors
- 🐛 Slow performance
- 🐛 Unreliable functionality

**Reported bugs**

- Reservations don't work
- Messaging doesn't work
- Gym crowd status not showing
- App constantly logs out
- Password reset emails not sent

**Requested features**

- Add Apple Watch app for tracking workouts
- Bring back average weekly visits on homepage
- Allow users to choose preferred branches
- Enable in-app membership renewal
- Allow users to customize home screen buttons


### Signa

[App page](https://appshunter.io/ios/app/signa-adaptive-training/id6808801450)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Signa Pro Monthly | $4.99 | per month |
| Signa Pro Annual | $44.99 | per year |


## Frequently asked questions

### Is Nautilus Plus free?

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

### Is Signa free?

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

### Do Nautilus Plus or Signa have ads?

Neither Nautilus Plus nor Signa shows ads.

### Which is updated more often, Nautilus Plus or Signa?

Nautilus Plus ships an update every 5 weeks, and Signa every 2 days. Most recently, Nautilus Plus was updated on November 2, 2026 and Signa on October 31, 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.*