What Day?? vs TurtleBackup
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
What Day??
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Features: Check the day of the week for any date from 1800 to 2300. Easy and fun to use. Great for planning birthdays, events, and more. Download now and always know your days!
TurtleBackup
This utility app allows you to back up files from memory cards to external drives or internal storage, ideal for travelers. It offers options for folder structure, file filtering, and incremental backups, ensuring data integrity and easy review of backup history.
- Backup memory cards to external drives or internal storage
- Organize backups by original structure, date, or date/type
- Filter files by creation date
- Incremental backup support
- Integrity check with checksum comparison
- Backup history log
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Easily backup files from memory cards to external drive (like USB flash drive) or to internal storage. Combined with a compatible USB hub / card reader, it’s a simple and lightweight photo backup solution for travel / short trips. Has 4 main features: Check, Backup, Integrity check, History. "Check" gives a brief overview / size estimate, and also confirms whether basic conditions (e.g. available space) are met. "Backup" copies files from source to destination. You have 3 options regarding folder structure on destination: • use original (same as source) folder structure • group files into folders by file creation date (YYYY-MM-DD, example: 2026-02-10/DSC_5555.JPG) or • group files by file creation date and type (YYYY-MM-DD/type, example: 2026-02-10/JPG/DSC_5555.JPG) There's also a filter feature - you can exclude files created before certain date (e.g. if you want to skip files created before the trip, but don't want to delete them from source). Incremental backup is supported as well - matching existing files are skipped, if size (and file creation time, depending on selected setting) is the same. Also, if you're using same backup source / destination each time, app will remember and pre-select them on startup, so in ideal scenario, backup can be performed just by clicking couple of buttons. "Integrity check" is optional, compares checksums of corresponding files from source folder to the ones in the destination folder. "History" is optional (can be enabled via settings) - saves (locally) basic statistics (date, number of files, etc.) about performed backups, which you can review later. App doesn't need a network connection and does not support backup to network locations (cloud etc.).
Screenshots
Verdict
The clearest difference is price: TurtleBackup at Free against What Day??'s $9.99. What Day??'s advantage is iOS requirement (14.0 vs 17.0.1). On update cadence, ads, in-app purchases 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
TurtleBackup is free to download; What Day?? costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
What Day?? ships an update every 5 weeks, TurtleBackup every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | What Day?? | TurtleBackup |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 5 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0.1 |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Pieter Yoshua Natanael | SERGEI SOKOLOV |
In-app purchases
What Day??
No in-app purchases
TurtleBackup
No in-app purchases









