Comparison

Nautilus Plus vs Signa

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Nautilus Plus

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
Read full description

You can now easily access all your Nautilus Plus membership information on your mobile or smartphone. Things like your virtual membership card, group exercise schedules, appointments with your personal trainer or nutritionist, record of workouts, your workout program, and more. Virtual Membership Card • Present your membership card by simply showing your phone Workout Session • Fix your weekly workout objective • Consult your weekly workout average • Consult your workout session total • Record of workouts (day, hour, club) • Sync your data from any trackers (Apple Health, Garmin, Fitbit, Strava, etc.) Workout Program • Consult your workout program • Complete your Fitness and Lifestyle Evaluation questionnaire • Consult the results of your Fitness and Lifestyle Evaluation questionnaire • Enter data during your workout session (duration, calories burned, number of reps, weights used) • Consult your workout data • Consult your workout calendar • Communicate with your personal trainer via integrated messaging Nutrition • Consult your nutrition plan • Consult different tools such as portion guide, your Healthy Plate, your Grocery List • Communicate with your nutritionist via integrated messaging Group Exercise Classes and Supervised Group Training Schedules • All class schedules in all clubs within our network • Refined search by type of class • Online registration Appointments • Book an appointment with your personal trainer, your nutritionist, your osteopath, or your massotherapist BOOMERANG Membership • Consult your accumulated credits

About

Signa

Features
Read full description

Most training apps hand you a plan written weeks ago and expect your body to cooperate. Signa asks six quick questions each morning, then builds today's session around your answers. HOW IT WORKS Five questions — sleep, how rested you feel, soreness, stress, energy — produce a readiness score out of 100. That score decides the session: how long, how hard, and which movements. Score low and you get a real session that is smaller, not a lecture. Score high and it opens up. SESSIONS BUILT FOR YOU Every session says why it looks the way it does: a long run yesterday, a lift you keep swapping out, what's behind this week. Sore muscles get the day off, and areas you mark as tight get a warm-up drill and a stretch. Each exercise has a "How to do it" guide, with warm-up sets, an optional cool-down, new bests, and a progress chart for every lift. TRAINING THAT FITS YOUR BODY Tell Signa about an injury and it trains around it. Train seated, with one arm or leg, or with limited grip or balance, and every session is built from exercises you can do. Tell Signa an exercise bothered you and the whole movement family is left out until you say otherwise. STRENGTH AND RUNNING IN ONE PLACE Sessions are built from your equipment, your experience and the time you actually have. Every exercise can be swapped for another that trains the same pattern. Walks, jogs and runs are tracked with GPS and coloured by pace, with splits and elevation, and logged alongside the lifting so your training record is one record. HEART RATE AND APPLE HEALTH Connect a Bluetooth heart rate strap, or a watch that broadcasts heart rate, such as Garmin, Polar, Coros or Suunto, for live heart rate and zones on walks, jogs and runs. Works with Apple Health. With your permission, Signa reads your resting heart rate and heart rate variability for morning readings, the heart rate your watch recorded during sessions you track in Signa, and the water and calories eaten that other apps save to Health. Signa only reads from Apple Health and never writes to it, and nothing it reads is used for advertising. A MORNING READING Your resting heart rate and HRV, from Apple Health, a strap or typed in, are read against YOUR baseline, never a population range. Signa won't interpret them until it has enough of your own history to know what normal looks like for you. RECOVERY THAT ADMITS WHAT IT KNOWS A recovery score from your training load, your sleep, your soreness and your morning reading. Every part is shown, and anything missing is named rather than quietly scored as zero. WHAT IT WILL NOT DO No invented numbers. No calorie estimate without your weight. No recovery score for someone who has never trained. Where Signa cannot know something, it says so instead of guessing convincingly. Your GPS routes never leave your device. Neither does cycle data, if you use it. There is no advertising, and nothing you log is ever sold. SIGNA PRO Recovery tracking, cycle-aware readiness, muscle balance, pace plans for a goal race, your full training record and CSV export. Workouts, runs, route maps, heart rate, morning readings, friends and achievements are free. Signa is a general fitness tool, not medical advice. SIGNA PRO SUBSCRIPTION Signa Pro is an optional auto-renewing subscription, billed monthly or yearly. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your App Store account settings. Terms of Use (EULA): https://signafit.ca/terms Privacy Policy: https://signafit.ca/privacy

Screenshots

Nautilus Plus4 screens
Signa4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Nautilus Plus versus Signa: the parameters behind the verdict, then further details
ParameterNautilus PlusSigna
PriceFreeFree
Rating3.3 (8 ratings) — better—
Positive reviews23.9% of reviews—
Number of ratings8 — better—
Update frequencyEvery 5 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size62 MB57 MB
Age rating12+17+
DeveloperNautilus PlusSigna Athletics Inc

Bugs and requests

Nautilus Plus

Reported bugs

76 issues
  • Reservations don't work
  • Messaging doesn't work
  • Gym crowd status not showing
  • App constantly logs out
  • Password reset emails not sent
Show 71 more
  • App connects to multiple tracking websites on login
  • Servers down for over a week
  • Error message: problem with the server
  • App crashes constantly
  • Login problems
  • Server issues
  • App not working half the time
  • Login issues every week
  • Error with Nautilus server
  • App crashes, error codes
  • Cannot load info or card
  • System is down
  • App not showing member card
  • Hard to login
  • DNS requests to Google advertising servers
  • Prevents login with ad blocker
  • Lost history of weights
  • Average number of weekly visits disappeared
  • Cannot log in
  • Error code: 'Error Try again later'
  • Server error
  • App is generally very slow
  • Workout programs not saved locally
  • Not working with the latest iOS
  • Error: 'Cannot read property ‘data’ of undefined'
  • Cannot access app
  • Boomerang doesn't work sometimes
  • Issues with client card and Boomerang
  • Does not work on iPhone 14 Pro Max
  • App unable to function on new iPhone
  • Impossible to finish workout
  • Error message: 'error with Nautilus Plus server'
  • Old programs harder to find
  • Membership card needs to be reloaded to wallet
  • Weight changes don't always save
  • Opening other app resumes workout a few sets back
  • Messages sent are deleted/not showing up
  • New version is worse than the old one
  • New update is not optimal
  • App is terribly slow
  • Resets randomly
  • Membership card difficult to access
  • Cannot add card to phone wallet
  • App always bugs when opened
  • Cannot install membership card in Apple Wallet
  • Buggy, crashes 99% of the time
  • Cannot open menu on the right-hand side
  • Top part overlaps phone status bar
  • Lack of retention for orientation to display membership card
  • Interface not adapted for Face ID phones
  • Entering values in workout program is frustrating
  • App not updated for new iPhone displays
  • Information not visible due to Dynamic Island
  • Impossible to add membership card to wallet app
  • Screen not sized properly for various iPhones
  • App not updated for 2 years
  • Buttons and menus not optimized for iPhone 14
  • Cannot add membership card to wallet
  • New update is worse than the previous version
  • More actions needed to execute training plan
  • UX needs review
  • Cannot add card to Apple wallet
  • App is not adapted to recent iPhones
  • Doesn't run easily
  • Apple Pay feature for card is impossible to make work
  • Multiple screens won't load
  • Add to Apple wallet is broken
  • Scanning still works but that's it
  • App is junk and abandoned
  • Doesn't work
  • Previous version was better

Requested features

16 requests
  • 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
Show 11 more
  • Add dark mode
  • Improve workout timer functionality
  • Allow users to disable auto-playing videos
  • Add option to save workout programs locally
  • Make app compatible with newer iPhone screens
  • Improve navigation for gym hours and attendance
  • Allow multiple preferred branches
  • Add ability to prepare workout entry during rest periods
  • Improve graphical clarity of the app
  • Allow users to add membership card to Apple Wallet
  • Improve account creation process

Signa

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Nautilus Plus

No in-app purchases

2 purchases

Signa

Subscriptions2
  • Signa Pro Monthly$4.991 Month
  • Signa Pro Annual$44.991 Year

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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