Chrono vs Nidoria
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Chrono
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Chrono is a sleep tracker built on one idea: tracking your sleep should be simple. No complicated data. A cute companion joins your sleep journey. But first, let's find out which one is yours. DISCOVER YOUR CHRONOTYPE - Find your natural sleep rhythm - It wakes up with you every morning. Sleep well and it shows WORKS WITHOUT APPLE WATCH - Turn on Sleep Focus before bed and you are good to go - No need to keep your phone on all night - Have an Apple Watch? Even better. Detailed sleep stages included LEARN ABOUT YOUR SLEEP - 7-day guided journey with sleep science - Daily lessons personalized to your chronotype - Understand why you sleep the way you do Your little friend is waiting for you :) Try Chrono free for 7 days and then get Chrono Premium for $4.99/mo ($29.99/yr) Terms of Use & Privacy Policy: https://leonardobilhalva.github.io/chrono-legal-docs/
Nidoria
This app tracks sleep quality using phone sensors, providing detailed sleep stage analysis and a daily sleep score. It offers soothing sounds, smart alarms, and motivational tools to help users improve their sleep habits and wake up refreshed.
- Automatic sleep tracking without wearables
- Sleep stage classification (Awake, Light, Deep, REM)
- Daily Sleep Score (0-100)
- Soothing sleep sounds library
- Smart alarm for gentle wake-ups
- Sleep reports and history
- Bedtime reminders and streaks
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Nidoria — Sleep Better Every Night Track your sleep, drift off to soothing sounds, and wake refreshed with a Smart Alarm that knows the perfect moment to wake you. WHY NIDORIA Most sleep apps just count hours. Nidoria measures quality. Using motion and audio sensors, we classify every stage of your night — Awake, Light, Deep, and REM — then turn it into a Sleep Score you can actually act on. FREE FEATURES Automatic Sleep Tracking • One-tap session start — place phone on bed, sleep, wake up to insights • Motion + audio detection classifies sleep stages with no wearable needed • Sleep Score (0–100) for every night over 30 minutes • Live session timer with discard option for false starts Sleep Sounds • Six categories: Rain, ASMR, Healing, Meditation, Nature, Noise • A selection of sounds is free — premium tracks unlock with Nidoria Premium, or unlock an individual track by watching a short ad • Favorites playlist and background playback during sleep sessions Sleep Reports • Nightly breakdown: score, duration, start and wake times • Full session history — browse any past night • Visual sleep stage timeline Streaks & Motivation • Track consecutive sleep-tracked nights • Milestone rewards at 3, 7, 14, and 30+ days • Weekly calendar view and longest streak record Bedtime Reminders • Custom wind-down notifications 10, 20, or 30 minutes before bed • Onboarding survey personalizes recommendations Privacy First • Guest mode — full tracking without an account • Local data storage with optional cloud sync • No data sold, ever NIDORIA PREMIUM — requires a paid subscription (in-app purchase) Upgrade to unlock: • Smart Alarm — wakes you during light sleep within a 15–30 minute window; custom bedtime + wake schedule with weekday repeat; full-screen alarm with snooze and dismiss • Unlimited Premium Sounds — full access to every sound, no ad needed to unlock • Ad-free experience — removes all ads • Advanced Sleep Insights — 7-day duration and deep-sleep trend charts PERFECT FOR • Light sleepers seeking gentler wake-ups • Anyone tracking sleep without a wearable • ASMR, rain, and meditation sound lovers • Habit-builders who love streaks • Insomniacs, students, parents, shift workers Download Nidoria. Sleep smarter tonight. Privacy Policy: https://appaspect.com/apps/nidoria-sleeptracker/terms.html Terms of Use: https://appaspect.com/apps/nidoria-sleeptracker/privacy-policy.html
Screenshots
Verdict
The clearest difference is ads: Chrono at none against Nidoria's shown. Chrono also leads on update cadence (every 3 days vs every 2 months). Nidoria's advantage is iOS requirement (15.0 vs 18.6). On price, in-app purchases and device support 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. Chrono sells 6 in-app purchases, starting at $4.99 per month and Nidoria sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Chrono ships an update every 3 days, Nidoria every 2 months. Both last shipped on October 31, 2026.
| Parameter | Chrono | Nidoria |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 days — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 582 MB | 159 MB |
| Age rating | 4+ | 12+ |
| Developer | Leonardo Barros Bilhalva | AppAspect Technologies Pvt. Ltd. |
In-app purchases
Chrono
- Chrono Premium - Monthly7 Days trial$4.991 Month
- Chrono Premium - Monthly$4.991 Month
- Chrono Premium - Annual 60% Off$11.991 Year
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- Chrono Premium - Annual7 Days trial$20.991 Year
- Chrono Premium - Annual$20.991 Year
- Chrono Premium - Annual7 Days trial$29.991 Year
Nidoria
- Monthly Premium Subscription$4.991 Month
- Yearly Premium Subscription$14.991 Year









