Assasa vs Core1
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Assasa
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Assasa is your companion for breathwork with breath holds – on iPhone and Apple Watch. Breathe in rhythm, hold your breath and see how your body responds. GUIDED BREATHING SESSIONS • Cyclic breathing, breath holds (retention) and recovery breaths in as many rounds as you like • Voice guidance, gong and vibration – even with the silent switch on and the screen locked; music from other apps keeps playing • Calibration finds your personal breathing rhythm • Practise with your eyes closed: vibration guides you through every phase • Soundscapes for focus or relaxation • After the last round, simply add 1 or 3 more rounds APPLE WATCH • Standalone sessions right on your wrist – the watch keeps vibrating with your arm lowered • Or as a remote: the watch mirrors your iPhone session and vibrates along • Advance the phase with a tap, double tap or the Digital Crown • Set rhythm and rounds right on the watch • Watch sessions appear automatically in your iPhone history HEART RATE ANALYSIS & APPLE HEALTH – NEW • Heart rate curve for every session with range (min–max) and average • Dive reflex analysis per round: heart rate drop during the hold, peak after the recovery breath and recovery time • Saves sessions as a Mind & Body workout (counts in Apple Fitness) and/or as mindful minutes • Trends: hold times over 12 weeks, practice calendar, plus HRV and resting heart rate from Apple Health • Your health data stays on your device and in Apple Health PROGRESS • History with every round, heart rate and personal best • Streaks, badges and milestones • Optional account to sync your history across devices DESIGN & PRIVACY • Deep black, OLED-optimised design • No subscription, no ads, no tracking • English and German Live heart rate requires an Apple Watch (standalone session or mirroring) and the Health mode “Workout” or “Both”. SAFETY Never practise breath holds in water, while driving or anywhere a loss of consciousness could be dangerous – always sit or lie down. Assasa is for relaxation and is not a medical device; heart rate values are for information only and not a medical diagnosis. If you have health concerns, talk to your doctor.
Core1
This app guides users to build a single habit at a time, visualizing progress as a growing tree. Users can name their tree, set reminders, and define personal rewards upon completion, fostering a sense of accomplishment and encouraging consistency.
- Focus on one habit at a time
- Grow a tree to visualize consistency
- Name your tree
- Set daily reminders
- Define personal rewards
- Build a forest of completed habits
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Focus on one habit. Just one. Core 1 helps you build one habit at a time. Plant a seed, watch it grow into a tree, and earn your reward when you're done. Features: - One habit at a time — no overwhelm - Grow a tree as you build consistency - Name your tree after who you want to become - Set daily reminders - Set a personal reward to celebrate your success - Build a forest of completed habits Start small. Stay steady. Watch it grow.
Screenshots
Verdict
The clearest difference is iOS requirement: Core1 at 15.1 against Assasa's 17.0. On price, update cadence, ads and in-app purchases 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.
Assasa ships an update every 5 days, Core1 every 3 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Assasa | Core1 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 10 MB | 22 MB |
| Age rating | 4+ | 12+ |
| Developer | Jan Moller | Heather Kim |
In-app purchases
Assasa
No in-app purchases
Core1
No in-app purchases








