Lief App vs moonbird (legacy)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lief App
This smart patch discreetly tracks heart rate and variability to help you manage stress. It offers drug-free biofeedback exercises to train your body's stress response, promoting mindfulness and control.
- HRV tracking
- Heart rate monitoring
- Biofeedback exercises
- Stress response training
- On-demand stress relief
- Drug-free solution
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Lief is a discreet, clinically-accurate smart-patch that measures your heart rate and heart rate variability. It trains you to control your body’s natural stress response through guided, gentle, and safe biofeedback exercises. Lief’s on-demand stress relief intervention is a 100% drug-free solution to improve your health and to remain mindful and in control throughout your day.
moonbird (legacy)
This app offers a guided exercise designed to provide immediate stress relief. Consistent daily use can lead to long-lasting effects, with a recommendation of twice daily for at least four weeks.
- Stress relief exercise
- Immediate relief
- Long-lasting effects
- Daily practice
- Guided sessions
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Modern life is stressful Moonbird helps you take a break. A single exercise with Moonbird causes immediate relief for those prone to stress but a consistent daily approach renders longlasting effects. We recommend using Moonbird twice daily for at least four weeks.
Screenshots
Verdict
The clearest difference is rating: Lief App at 4.0 against moonbird (legacy)'s 3.4. moonbird (legacy)'s advantage is monetization model (free vs paid) and review sentiment (69% vs 45%). On price, ratings volume, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Lief App holds the better App Store score, 4.0 against 3.4. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews complicate that: 45% of Lief App's written reviews are positive against 69% of moonbird (legacy)'s, so the app with the better star average is not the one people write more warmly about.
Lief App ships an update every 5 weeks, moonbird (legacy) every 6 weeks. Both last shipped on November 3, 2026.
| Parameter | Lief App | moonbird (legacy) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) — better | 3.4 (5 ratings) |
| Positive reviews | 44.7% of reviews | 69.2% of reviews — better |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 5 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 80 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | BrainBot, Inc. | Moonbird |
Customer experience
Lief App
moonbird (legacy)
Bugs and requests
Lief App
Reported bugs
19 issues- Unable to download latest update
- App bricked after update
- Stuck on pulsing screen
- Won't connect on iPhone or Mac
- Self-pacing (buzzing) not working
Show 14 moreShow fewer
- Annoying check-in feature cannot be turned off
- App cannot be opened
- Cancel subscription button not working
- App crashes upon opening
- App kicks user off after update
- App crashes multiple times when opened
- App does not reliably download data
- App unstable after recent updates
- App crashes, kills battery
- App chews through cell data
- App not connecting reliably to internet
- App does not work without connection
- Device keeps telling user they are stressed
- App takes a long time to load
Requested features
6 requests- Add button to turn off vibration
- Make subscription more affordable
- Sell device outright
- Provide clear instructions/manual
- Improve data breakdown and comparison
Show 1 moreShow fewer
- Allow adding notes for activities/moods
moonbird (legacy)
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Lief App
No in-app purchases
moonbird (legacy)
No in-app purchases
