Lastgrain vs Memento
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lastgrain
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Lastgrain is a life timer that shows the time you have lived and the time you have left based on your birth date and expected lifespan. It quietly visualizes the passage of your life through an hourglass and numerical displays. This app does not make predictions. It is not intended for medical diagnosis or statistical life expectancy forecasting. It simply displays the passage of time in a visible form based on the values you enter. Main features - Display elapsed time and remaining time - Show overall progress as a life timer - Toggle seconds on / off - Support Light / Dark / System theme - Home Screen widget support - Store input data locally on your device Rather than pushing you with notifications or flashy effects, Lastgrain is designed to offer a quiet experience of observing time through an hourglass and numbers. It is not primarily for time management or productivity, but for gently reconnecting you with your sense of time. Please note - Displayed values are calculated based on your input and your device’s current time - This app does not provide medical or statistical predictions - If you find it emotionally overwhelming, please discontinue use
Memento
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Memento は、あなたの人生を一本のタイムラインとして描くアプリです。 誕生から今日、そして人生の終わりまでを一望することで、「残された時間」を意識し、日々の行動を人生の目標につなげます。 ■ 人生を、一望する これまでとこれからを一本の線に。ズームすれば一日単位まで、引けば一生を見わたせます。 ■ 目標から、逆算する 結婚・マイホーム・起業といった人生のマイルストーンから逆算して、何層にも計画を立てられます。「何のために、今日これをやるのか」がつながります。 ■ 今日と、つなげる 上位の目標に紐づいた「今日やるべきこと」を表示。人生の目標と、今日の一歩が地続きになります。 ■ 軌跡を、残す 過去の出来事(入学・就職・出会い・出産など)を、写真やアイコンとともにタイムラインに刻めます。目標を達成した日には、写真や動画とふり返りを記録できます。 ■ こんな方へ ・日々に追われ、人生の大きな方向を見失いがちな方 ・「いつかやりたい」を、具体的な計画に落としたい方 ・限りある時間を、後悔なく使いたい方 一度きりの人生を、今日から充実したものに。
Screenshots
Verdict
The clearest difference is in-app purchases: Memento at none against Lastgrain's 1. Memento also leads on update cadence (every 2 days vs every 2 months) and device support (3 vs 1). On price 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. Lastgrain sells 1 one-off in-app purchase. Memento asks for nothing beyond the download.
Lastgrain ships an update every 2 months, Memento every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Lastgrain | Memento |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Takafumi Kawano | Yuto Nakamoto |
In-app purchases
Lastgrain
- Lastgrain Plus$5.99
Memento
No in-app purchases









