Comparison

Opelog vs Replace

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Opelog

Read full description

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. β€œWhen did I open this serum?” β€œHow long have I been using this lotion?” β€œWhen did I last replace this toothbrush?” β€œIs it time to check this filter?” Opelog helps you remember those small everyday β€œwhen 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 β€œfavorite,” β€œbuy again,” or β€œdo 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.

About

Replace

Features
Read full description

"When did I last change this?" A reminder for the small things around the house that quietly wear out. - Just register the cycle - A toothbrush, a water filter, contact lenses, a fire extinguisher; anything at all - Choose an interval, one month, three months, whatever it is - A word when it is about time - When the change is coming up, you are told quietly - Even something years away is booked properly, and arrives without opening the app - Press "changed" and the next date is set for you - Made to be safe to use - Everything stays inside this device only (nothing is sent anywhere) - No ads - Contact lenses are a regulated product. For how long to wear them and when to replace them, follow your eye care professional and the instructions that came with the lenses, ahead of anything shown here - Five items are free, and the records and the reminders are free You do not have to remember. Let the app remember.

Screenshots

Opelog4 screens
Replace4 screens

Verdict

The call

The clearest difference is in-app purchases: Opelog at none against Replace's 1. Opelog also leads on update cadence (every 3 days vs every 10 days). Replace's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Replace sells 1 one-off in-app purchase. Opelog asks for nothing beyond the download.

UpkeepUpdate frequency

Opelog ships an update every 3 days, Replace every 10 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
Opelog versus Replace: the parameters behind the verdict, then further details
ParameterOpelogReplace
PriceFreeFree
Update frequencyEvery 3 days β€” betterEvery 10 days
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS17.015.0 β€” better
Further details β€” not scored
Size6 MB27 MB
Age rating4+4+
DeveloperYusei AndoAKIHIRO MATSUYAMA

In-app purchases

None

Opelog

No in-app purchases

1 purchases

Replace

One-time1
  • γ‚’γ‚€γƒ†γƒ γŒη„‘εˆΆι™οΌˆθ²·γ„εˆ‡γ‚ŠοΌ‰$1.99

Questions

Is Opelog free?
Opelog is free to download, with no in-app purchases.
Is Replace free?
Replace is free to download, with in-app purchases available.
Do Opelog or Replace have ads?
Neither Opelog nor Replace shows ads.
Which is updated more often, Opelog or Replace?
Opelog ships an update every 3 days, and Replace every 10 days. Most recently, Opelog was updated on October 25, 2026 and Replace on October 31, 2026.

Other comparisons