Opelog vs KARARI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Opelog
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Opelog is a simple open date log and product tracker for cosmetics, skincare, beauty items, and everyday essentials. Record when you opened an item, track how many days have passed, and set check dates or reminders for replacements. “When did I open this serum?” “How long have I been using this lotion?” “When did I last replace this toothbrush?” “Is it time to check this filter?” Opelog helps you remember those small everyday “when did I open it?” moments with photos, dates, reminders, and notes. You can record item photos, categories, open dates, check dates, reminders, and notes. Opelog makes it easy to see how many days have passed since opening an item and how many days remain until the next check. Finished items can be saved to your finished-item log. You can review the open date, finish date, and number of days used, making it easier to plan replacements, repurchases, and beauty empties records. You can also add notes such as “favorite,” “buy again,” or “do not repeat” to finished items. It is useful for skincare reviews, cosmetic empties, daily item replacement records, and repurchase planning. Opelog can be used without login, and your data is stored on your device. Main Features - Record open dates for cosmetics, skincare, and daily items - Track days since opening - Set check dates and reminders - Manage items with photos - Save finished-item logs - Record days used - Add favorite, buy again, or do not repeat notes - Organize items by category - Search items - View photos in full screen - Change app themes - Store data on your device You can record up to 15 active items for free. If you want to add more items or unlock additional themes, you can choose to watch a rewarded video ad. Recommended For - People who use multiple skincare or cosmetic products - Anyone who forgets when they opened lotion, serum, cream, sunscreen, or makeup - People who want a simple cosmetics tracker or skincare tracker - People who want to record beauty empties and repurchase notes - Anyone who wants to track how long it takes to finish a product - People who want replacement reminders for everyday items - Anyone who wants to record contact lens solution, eye drops, toothbrushes, razors, filters, refills, and daily essentials - People who want to organize items visually with photos - Anyone looking for a simple and cute open date log app Item Examples - Lotion - Serum - Cream - Sunscreen - Mascara - Lip products - Perfume - Hair care products - Contact lens solution - Eye drops - Toothbrushes - Razors - Shampoo - Seasonings - Pet food - Water purifier filters - Refill items - Cleaning supplies - Other daily items Privacy Opelog can be used without login. Your data is stored on your device. Opelog does not determine expiration dates, safety, or whether an item is still usable. Displayed days, notifications, and check dates are based on the information set by the user.
KARARI
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KARARI(カラリ)は、コスメの「開封後の使用期限」を管理する、誌面のように静かなアプリです。 化粧水も、日焼け止めも、マスカラも、開けた瞬間から使えるうちに使い切りたい。 でも「いつ開けたか」「あと何日もつか」は、意外と忘れてしまう。 KARARI は、開封日と目安(PAO)から使い切りどきを計算し、もうすぐのコスメをそっと教えます。 できること ・開封後の使用期限(PAO)を自動計算。残り日数を大きな数字で表示 ・もうすぐ期限のコスメが、ひと目でわかる一覧 ・写真・文字読み取り・バーコードで、かんたん登録(ずっと無料) ・使い切りどきの通知 ・棚(正面図)表示で、収納場所ごとに見渡せる ・サインインすれば、コスメ棚を無料でクラウドにバックアップ・同期 無料でできること ・コスメの登録(管理中30点まで/使い切ると枠が空きます) ・かんたん入力・リマインダー ・Sign in with Apple で、バックアップと端末間の同期 プレミアム(サブスクリプション) ・登録数が無制限に ・家族・パートナーと同じ棚をシェア ・使い切り率と「むだ買い回避額」を数字で振り返る統計 プレミアムの料金・自動更新について ・年額 ¥2,300(一括請求・月あたり約¥191)/ 月額 ¥400 ・プレミアムは自動更新のサブスクリプションです。購入は Apple ID に請求され、現在の期間終了の24時間前までに自動更新をオフにしない限り、自動的に更新されます。 ・更新料金は期間終了前の24時間以内に請求されます。 ・登録内容の確認・解約は、App Store の「サブスクリプション」から行えます。 利用規約:https://karari-app.web.app/terms.html プライバシーポリシー:https://karari-app.web.app/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Opelog at none against KARARI's 2. Opelog also leads on iOS requirement (17.0 vs 26.0). KARARI's advantage is update cadence (daily vs every 3 days). On price, ads 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. KARARI sells 2 in-app purchases, starting at $1.99 per month. Opelog asks for nothing beyond the download.
Opelog ships an update every 3 days, KARARI daily. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.
| Parameter | Opelog | KARARI |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 6 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Yusei Ando | Hasegawa Yuki |
In-app purchases
Opelog
No in-app purchases
KARARI
- プレミアム(月額)$1.991 Month
- プレミアム(年額)$14.991 Year









