Comparison

Slouchless vs Nudge

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

Head to head
About

Slouchless

Features
Read full description

Slouchless is a posture reminder that nudges you to sit up straight during desk work. It works with or without AirPods. TWO WAYS TO USE IT - Timed reminders (no AirPods needed): get a "posture check" notification every 15-60 minutes. Works on any iPhone or iPad - just pick an interval and tap Start Reminders. - Automatic posture detection (with AirPods): connect AirPods (supported models) and Slouchless uses their motion sensors to detect when you slouch, then notifies you automatically. Calibrate once in a good posture. No camera, no HealthKit. KEY FEATURES - Timed reminders that need no AirPods or accessories - Automatic posture detection when AirPods are connected - One-tap calibration to set your personal baseline - Tracks your daily good-posture rate and reminder count SLOUCHLESS PRO - Custom sensitivity threshold (5deg-45deg) - 7-day posture history - Ad-free Pro is a one-time purchase β€” no subscription, no auto-renewal. Existing subscribers keep their access. Terms of Use: https://rivership.org/terms Privacy Policy: https://rivership.org/privacy

About

Nudge

Features
Read full description

Nudge reads head orientation from compatible headphones and gently reminds you when you lean too longβ€”quiet coaching for better sitting habits. WHAT YOU GET β€’ Real-time posture: upright, forward, left, or right β€’ Personal calibration to your comfortable baseline β€’ Gentle local notifications and haptics with adjustable sensitivity, sustain, and cooldown β€’ Quiet hours when you need focus or rest β€’ Live Activity on Lock Screen and Dynamic Island while monitoring β€’ Today insights: good-posture ratio, monitored time, reminder count, and lean directions β€’ Smart background sampling with AirPods connected; skips polls while walking, running, or in a vehicle COMPATIBLE HEADPHONES Requires headphones with dynamic head tracking, such as AirPods Pro, AirPods (3rd generation or later), AirPods Max, or supported Beats. Wear them and connect before monitoring. PRIVACY Motion and stats stay on your device. No account. No cloud upload. Delete the app to remove stored data. SUBSCRIPTION Nudge Pro unlocks full monitoring, reminders, and insights. Choose monthly or yearly. New subscribers can start with a 1-week free trial and cancel anytime. Nudge is a posture habit coach, not a medical device. It does not diagnose or treat any condition. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Slouchless3 screens
Nudge4 screens

Verdict

The call

The clearest difference is ads: Nudge at none against Slouchless's shown. Slouchless's advantage is update cadence (every 10 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Slouchless sells 3 in-app purchases, starting at $3.99 per month and Nudge sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Slouchless ships an update every 10 days, Nudge monthly. Both last shipped on November 5, 2026.

Scorecard2 real differences Β· 4 level
Slouchless versus Nudge: the parameters behind the verdict, then further details
ParameterSlouchlessNudge
PriceFreeFree
Update frequencyEvery 10 days β€” betterMonthly
AdsYesNo β€” better
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details β€” not scored
Size12 MB5 MB
Age rating4+4+
DeveloperRIVERSHIPWen-Jen Chen

In-app purchases

3 purchases

Slouchless

Subscriptions2
  • Slouchless Pro (Monthly)7 Days trial$3.991 Month
  • Slouchless Pro (Yearly)7 Days trial$19.991 Year
One-time1
  • Lifetime Unlock$19.99
2 purchases

Nudge

Subscriptions2
  • Nudge Pro Monthly7 Days trial$0.991 Month
  • Nudge Pro Yearly7 Days trial$9.991 Year

Questions

Is Slouchless free?
Slouchless is free to download, with in-app purchases available.
Is Nudge free?
Nudge is free to download, with in-app purchases available.
Do Slouchless or Nudge have ads?
Slouchless shows ads; Nudge does not.
Which is updated more often, Slouchless or Nudge?
Slouchless ships an update every 10 days, and Nudge monthly. Most recently, Slouchless was updated on November 5, 2026 and Nudge on November 5, 2026.

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