Timer Holic vs Keystone Correction
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Timer Holic
This utility app allows for quick and easy timer setup, focusing on speed and simplicity over extensive features. It supports multiple simultaneous timers and precise second-by-second time setting.
- Quick timer setup
- Customizable alert messages
- Up to 10 simultaneous timers
- Set time by the second
- Stopwatch functionality
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"I do not need anything else but I want to set the time fast ..." Timer Holic is aiming for a different goal than many of the timer apps out there. We focused on things that were quick and easy to set up, rather than rich features. No matter what time you set, it can take a few seconds. Other features - Customizable alert message - Use up to 10 timers at the same time - Set time by second - Stopwatch (set time to 1 second) "Leave the small timing to Timer Holic and you pay attention to more important things."
Keystone Correction
Easily scan and auto-correct documents directly on your device. This secure app keeps your images private by not uploading them online, making it ideal for sensitive business use. All functions are available for free, with no registration or complicated steps required.
- Automatic keystone correction
- Secure offline processing
- Easy document digitization
- Free to use all functions
- No user registration
- Simple interface
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* [Easy] scan and auto-correction * [Secure] don't upload images to the Internet. * [Free] free for all functions. Comcam is a simple, secure, and powerful scanner App ## how to use Step 1: Take a photo or load an existing photo Step2. cut out the part you want Step3. save to a photo app or share to another app ## features - Since the captured images are not uploaded to the Internet, you can be used for business without worrying about security. - Paper documents can be easily digitized, making it possible to go paperless with little effort. - There are no complicated functions, so anyone can use it easily. - Use all features for free. - No user registration required. - No need to upload images to the Internet.
Screenshots
Verdict
The clearest difference is in-app purchases: Keystone Correction at none against Timer Holic's 1. Timer Holic's advantage is ads (none vs shown) and review sentiment (93% vs 67%). On price, rating, ratings volume and update cadence 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. Timer Holic sells 1 one-off in-app purchase. Keystone Correction asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for Timer Holic against 5.0 for Keystone Correction. Both are backed by a comparable volume of ratings — 14 and 5 respectively. Written reviews are what separate them: 93% of Timer Holic's written reviews are positive against 67% of Keystone Correction's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on July 7, 2026 and September 16, 2026 respectively.
| Parameter | Timer Holic | Keystone Correction |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (14 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 92.9% of reviews — better | 66.7% of reviews |
| Number of ratings | 14 — better | 5 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeong-min Yi | Masayoshi Shibata |
Customer experience
Timer Holic
Keystone Correction
In-app purchases
Timer Holic
- Upgrade To Full Version$0.99
Keystone Correction
No in-app purchases
Questions
Is Timer Holic free?
Is Keystone Correction free?
Which has better reviews, Timer Holic or Keystone Correction?
Do Timer Holic or Keystone Correction have ads?
Which is updated more often, Timer Holic or Keystone Correction?
Other comparisons
