JoyaTimer vs MochiLog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JoyaTimer
This app simulates the Japanese tradition of ringing a temple bell 108 times on New Year's Eve. It allows precise timing for each strike with sound and vibration, ensuring the final strike lands exactly at midnight. Features include customizable intervals, strike counts, and a special "Joya Mode" for automatic start time calculation.
- Customizable strike interval and count
- Joya Mode for automatic start time calculation
- Sound and vibration alerts
- Device stays awake while timer runs
- Compass for finding north
- Game Mode for timing challenges
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JoyaTimer is a specialized yet simple timer app inspired by a Japanese traditional New Year’s Eve event called “Joya no Kane”. At many Buddhist temples across Japan, priests strike the temple bell 108 times on New Year’s Eve. The final strike should sound exactly at 0:00 a.m. on January 1st. This app helps you ring the bell at precise timing with sound and vibration (iPhone only). I originally made this app for New Year’s Eve 2011 and actually used it. It was convenient, so I decided to publish it. Key Features • Set the interval (seconds) between strikes (default: 20 seconds) • Set the number of strikes (default: 108) • “Joya Mode” (default: ON) automatically calculates and displays when you should start the first strike so that the last strike finishes exactly at midnight • Sound alerts at the configured interval, plus vibration support (iPhone only) • If Joya Mode is OFF, you can pause the timer • While Joya Mode is ON, the Start button disappears after starting to prevent accidental taps • The device will not sleep while the timer is running (please watch your battery) • Compass: find north on the timer screen (supported devices only) Tip When you press Start, it counts as the first strike. If you plan to ring 108 times, setting the count to 109 and ignoring the first “strike” can make the operation easier. How-to Video https://youtu.be/CQwCRaXpC9I New Features from Ver. 7 • Start Now (Beta): quick-start support for late-evening use • Game Mode (Beta): timing challenge for accurate bell strikes • End-time setting: choose when the ringing should finish Improvements after Ver. 7 • (7.1) Improved judgement accuracy and score display • (7.1) Enhanced mic threshold tuning and effects • (7.2) Enhanced scoreboard and high-score effects • (7.3) Internal code optimization and maintainability improvements • (7.4) Added support for iPhone Duo. Notes / Important • Please make sure your iOS device clock is accurate • Airplane Mode is recommended (the app is configured not to run in the background) • Test and simulate the timer in advance • If pressing Start exactly at the first strike is difficult, set the count to 109 and begin from the second alert • “Time Correction” was added in Ver. 2.9 because it is hard to adjust iOS clocks at the second scale. If your device is 5 seconds ahead of actual time, set it to “-5”. Since Airplane Mode is recommended, network time sync (e.g., NTP) is not assumed; manual correction works best • If you find any bug, please contact the support page (Facebook page) Sound List (sound number mapping) Sound quality is not good yet; we plan to re-record in the future. 1. Electric sound 2. Big bell (Electric) 3. Big bell in Jyousenji temple (bad sound due to a crack) 4. Bell in Jyousenji (Large Kin) 5. Bell in Jyousenji (Medium Kin) 6. Sawari in Jyousenji
MochiLog
This app provides accurate battery health information by analyzing your device's system logs. It offers detailed metrics like real capacity, cycle count, and wear level without needing a computer. All processing is done on-device for enhanced privacy.
- Real battery capacity (mAh)
- True cycle count
- Precise wear level
- History graph from multiple logs
- 100% on-device processing
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MochiLog helps you record battery changes using analytics files from iPhone, iPad and Apple Watch. Review capacity, cycle count, temperature and other available log data in device-specific history and charts. Import multiple files, select and delete records, and export or import your data. Optional iCloud sync shares records between devices using the same Apple Account. Automatic log collection in 4.0.0 Pair with the Mac or Windows companion to receive encrypted daily analytics files collected by your computer. Analysis and record creation happen on the mobile device. Apple Watch logs stored on an iPhone are supported. Manual import remains available without a computer. The optional Live Battery tab shows current capacity, cycle count and other available readings, with the last acquisition time. These values are not saved to history or iCloud. On-device Collection is an optional experimental feature requiring a compatible local VPN/reflector route and OS pairing. It can be enabled independently from PC Transfer. Background acquisition is attempted when permitted by the OS; execution time and frequency are not guaranteed. Requirements • Core record management: iOS/iPadOS 16 or later • iCloud sync: 17 or later • PC Transfer: 27 or later, with macOS 27 or later, or Windows 11 • On-device Collection: 17 or later. Initial pairing entirely on the device requires 27 or later and Developer Mode • Daily log collection requires an unlocked device and generated analytics data Available in Japanese, English, Simplified Chinese, Traditional Chinese, Korean, Spanish, French and German. Tips are optional. Readings are informational and do not replace Apple diagnostics or repair and warranty guidance.
Screenshots
Verdict
The clearest difference is review sentiment: MochiLog at 90% against JoyaTimer's 0%. MochiLog also leads on rating (5.0 vs 2.0) and update cadence (every 3 weeks vs every 2 months). JoyaTimer's advantage is monetization model (free vs free with in-app purchases). On price, ratings volume, ads and in-app purchases 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. JoyaTimer sells 1 one-off in-app purchase and MochiLog sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
MochiLog holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 0% of JoyaTimer's written reviews are positive against 90% of MochiLog's.
JoyaTimer ships an update every 2 months, MochiLog every 3 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | JoyaTimer | MochiLog |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 90.0% of reviews — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 15 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Daishin Ueyama | ryuya watanabe |
Customer experience
JoyaTimer
MochiLog
In-app purchases
JoyaTimer
- Donate a cup of coffee.$0.99
MochiLog
- Buy me a coffee$0.99
- Buy me a lunch$1.99
- Buy me a dinner$4.99









