# Flip Timer & stopwatch vs PDF Indexer

The clearest difference is in-app purchases: PDF Indexer at none against Flip Timer & stopwatch's 3. PDF Indexer also leads on rating (5.0 vs 4.6) and update cadence (every 2 days vs every 3 months). Flip Timer & stopwatch's advantage is ratings volume (7.6K vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Flip Timer & stopwatch sells 3 one-off in-app purchases. PDF Indexer asks for nothing beyond the download.

PDF Indexer holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flip Timer & stopwatch has 7.6K ratings behind it against 2, so its average is the more settled of the two.

Flip Timer & stopwatch ships an update every 3 months, PDF Indexer every 2 days. The most recent releases landed on October 26, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Flip Timer & stopwatch | PDF Indexer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (7.6K ratings)](https://appshunter.io/ios/app/flip-timer-and-stopwatch/id1304344207/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pdf-indexer/id6799589624/reviews)** |
| Number of ratings | **7.6K** | 2 |
| Positive reviews | 68.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 46 MB | 53 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [俐 马](https://appshunter.io/developer/1896144174) | [MATTHEW BYONG BAE](https://appshunter.io/developer/6776132813) |

## What reviewers say

### Flip Timer & stopwatch

[App page](https://appshunter.io/ios/app/flip-timer-and-stopwatch/id1304344207)

This app offers a full-screen digital timer with a unique flip animation to visualize time progression. It also includes a stopwatch for tracking activities like workouts, study sessions, and work. Customize reminder sounds and background audio for an immersive experience.

**Highlights:** Full-screen digital timer, Flip animation for time visualization, Countdown timer, Stopwatch functionality, Customizable reminder sounds, Background sound options, Keep screen on for progress viewing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| All the skins | $0.99 | one-time |
| Pro Version | $1.99 | one-time |

**What reviewers like**

- 👍 Simple and straightforward design
- 🚀 Large, easy-to-read display
- 💡 Unique flipping timer interface
- 🕰 Remembers previous time settings
- 👍 Works well for classroom/productivity use

**What reviewers complain about**

- 🐛 Timer sometimes skips seconds or doesn't work accurately
- 💰 Ads are intrusive and disruptive
- 🔒 Paid features should be included in free version
- 🔋 Timer stops working when device is locked or app is in background

**Reported bugs**

- Timer randomly stops counting down
- Unable to stop/reset timer once started
- Ads prevent user from interacting with timer

**Requested features**

- Add option to set timer in hours/minutes/seconds
- Implement repeat/loop functionality for timer
- Allow custom alarm/notification sounds
- Improve landscape mode support


### PDF Indexer

[App page](https://appshunter.io/ios/app/pdf-indexer/id6799589624)

This app creates fast navigation for PDFs by turning title-to-page mappings into searchable indexes. It allows you to import mappings from various file formats and opens directly to the mapped page within the PDF. All data is stored locally on your device for privacy.

**Highlights:** Search across multiple indexed PDFs, Exact, prefix, substring, and alias matching, Jump directly to mapped pages, Import mappings from CSV, JSON, XLSX, and text, Page-offset calibration, Mapping correction and export, Local-first data storage

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Flip Timer & stopwatch free?

Flip Timer & stopwatch is free to download, with in-app purchases available.

### Is PDF Indexer free?

PDF Indexer is free to download, with no in-app purchases.

### Which has better reviews, Flip Timer & stopwatch or PDF Indexer?

PDF Indexer is rated higher. Flip Timer & stopwatch averages 4.6 out of 5 from 7.6K ratings, while PDF Indexer averages 5.0 from 2 ratings.

### Do Flip Timer & stopwatch or PDF Indexer have ads?

Both Flip Timer & stopwatch and PDF Indexer show ads.

### Which is updated more often, Flip Timer & stopwatch or PDF Indexer?

Flip Timer & stopwatch ships an update every 3 months, and PDF Indexer every 2 days. Most recently, Flip Timer & stopwatch was updated on October 26, 2026 and PDF Indexer on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*