Pan Diary vs Opelog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pan Diary
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Tired of wasting money on expired skincare? Want to declutter your beauty stash but don't know where to start? Meet your new offline beauty inventory! Designed for makeup lovers and minimalism seekers, this app is more than just an expiration tracker—it’s your personal space to conquer your "Project Pan" goals and build a mindful beauty routine. Key Features Smart Expiry & PAO Tracker Easily log your cosmetics and skincare products. Track their opening dates and PAO (Period After Opening). Get timely reminders before your products expire, helping you use what you own and stop wasting money. Your "Empties" Room Don't just throw away used products—celebrate them! Move finished items to the "Empties Room". Watching your collection of completed products grow brings an incredibly satisfying sense of achievement and helps you declutter mindfully. Aesthetic Monthly Recaps Automatically generate beautiful, aesthetic poster recaps of your monthly empties. Perfect for sharing your Project Pan journey on Instagram, TikTok, or Pinterest! 100% Offline & Private No sign-ups, no Wi-Fi needed, and zero ads. Your beauty stash data is stored strictly on your local device. Fast, clean, and completely secure. Say NO to Subscriptions We believe in simple, honest pricing: The core features are Completely FREE with unlimited product entries! If you love the app and want to support an indie developer, you can unlock premium aesthetic posters and advanced features with a One-Time Purchase. No sneaky monthly fees, yours forever. Download now, declutter your vanity, and make every drop count!
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.
Screenshots
Verdict
The clearest difference is in-app purchases: Opelog at none against Pan Diary's 1. Opelog also leads on update cadence (every 3 days vs fortnightly). On price, ads, device support and iOS requirement 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. Pan Diary sells 1 one-off in-app purchase. Opelog asks for nothing beyond the download.
Pan Diary ships an update fortnightly, Opelog every 3 days. The most recent releases landed on September 12, 2026 and September 8, 2026 respectively.
| Parameter | Pan Diary | Opelog |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | 亚奇 陈 | Yusei Ando |
In-app purchases
Pan Diary
- Pan Diary - Permanent Buyout$3.99
Opelog
No in-app purchases







