Polariss vs Hitotsubu
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Polariss
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Keep the days you look forward to on your Home Screen. Your next concert. The trip you just booked. An anniversary or a birthday that matters. Polariss is a countdown app that keeps those dates close, with the days left visible in the app and on your Home Screen. โ Make the wait part of the fun Add a concert when you get your tickets, or a vacation when you book your trip. You can also count down to an exam or race day. Keep the date and notes together in each event's details. โ A little something to look forward to, every day Basic countdown and calendar widgets are free. Choose the event you want to see on your Home Screen. Getting-started guides help you create your first event and set up a widget. โ Start free Save up to 3 upcoming events and keep past events as memories without a limit. Event editing, categories, sorting, basic reminders, and iCloud sync are also free. โ Share the excitement Create a countdown card or a widget-style image to share on social media or in a message. Save the image and look forward to the day together. โ Reminders and sync Get a reminder the day before and on the day of an event. Turn notifications on or off and choose the default reminder hour. Sync events and notes with iCloud. โ Polariss Pro โ make it yours A one-time purchase unlocks unlimited upcoming events, 6 additional themes for individual events, and custom widget background, text, and accent colors. Keep up to 3 events together in a Medium widget or 6 in a Large widget. Add a countdown to your Lock Screen with circular, rectangular, or inline widgets. Preview the appearance in the app before purchasing. No ads. No subscriptions. Free features remain available without purchasing Pro. Event titles, notes, and dates are not sent as usage analytics events.
Hitotsubu
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There was a time when my days were consumed by work and alcohol. I would wake up with a heavy head and a bleak mood after drinking too much. While wondering how to sober up, I would head back to work that seemed to have no end. The project was a death march. Every day, I repeated the same hell without knowing when it would end. After work, I drank while stopping at convenience stores on my way home. I had no time to play the games I once loved, and no room left to think about what I wanted. My body and mind felt like mud. Back then, there was a vending machine on the platform of my nearest station that sold canned shijimi clam miso soup. When I drank it, I felt as though a little nourishment reached my clouded mind and restored a small amount of strength to keep living. Just to drink that can of soup, I barely managed the 14-minute walk to the station. It did not give me the power to change my life. But I still had enough strength to go and drink that shijimi miso soup. Looking back now, I think that was one small grain too. Hitotsubu is an app for placing the small events and feelings of each day into a bottle, one grain at a time. Something tasted good. Something looked beautiful. I laughed. I felt relieved. I finished something. Someone helped me. I somehow made it through today. It does not have to be a major event. You do not need an impressive goal or a long piece of writing. Just tap once in that moment. The grains you save collect in a bottle. Bottles go into wooden crates. Crates go into containers. The time you have accumulated eventually becomes a vast warehouse. When you look back at that warehouse, you may realize: I thought I had done nothing, but I lived through all of these days. It is a place for keeping those memories. In Hitotsubu, grains cannot be edited or deleted. Even an accidental tap remains as one grain from that day. This is not an app for creating a perfect record. It is an app for preserving the time you actually lived, exactly as it happened. You do not have to change your life. You do not have to become positive. Just remember: Something tasted a little better. I smiled a little. Something helped me. I made it through today. Do not let those moments disappear. One grain may not change anything. But someday, that grain may remind you that something was still alive within you.
Screenshots
Verdict
The clearest difference is price: Polariss at Free against Hitotsubu's $1.99. Polariss also leads on update cadence (weekly vs every 3 months). Hitotsubu's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Polariss is free to download; Hitotsubu costs $1.99 up front. Polariss sells 1 one-off in-app purchase. Hitotsubu asks for nothing beyond the download.
Polariss ships an update weekly, Hitotsubu every 3 months. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.
| Parameter | Polariss | Hitotsubu |
|---|---|---|
| Price | Free โ better | $1.99 |
| Update frequency | Weekly โ better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone | iPhone, iPad โ better |
| Requires iOS | 17.0 โ better | 18.0 |
| Further details โ not scored | ||
| Size | 6 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Yutaka Kubota | Makoto Fukuoka |
In-app purchases
Polariss
- Polariss Pro$4.99
Hitotsubu
No in-app purchases









