Caline vs Chronographer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caline
This calculator app allows users to save and refer to past calculation memos. It supports a wide range of functions, including trigonometric and logarithmic operations, and displays units like k, M, p, and % for better readability. It can also express values in decibels and hexadecimal format.
- Save and recall calculation memos
- Trigonometric and logarithmic functions
- Variable support
- Unit display (k, M, p, %)
- Decibel expression
- Hexadecimal conversion
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Calculation results can be saved, so you can refer to past calculation memos Addition, subtraction, multiplication, division, trigonometric functions, logarithms, variables, etc. can be used Readability is good because units such as k, M, p, and % can be used Can also be expressed in decibels, such as 6dB Can be written in hexadecimal, like $1A
Chronographer
This app helps you meticulously track the accuracy of your mechanical watches. It records time differences, calculates detailed performance metrics, and visualizes trends with charts and histograms. You can also manage your watch collection, log daily wear, and analyze positional variations.
- Track mechanical watch accuracy
- Calculate detailed performance metrics
- Visualize accuracy with charts and histograms
- Manage watch collection with notes and photos
- Log daily watch wear
- Analyze positional variation
- Export watch data
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Chronographer is for people who enjoy mechanical watches. It does two things: 1. Tracks your watches’ long-term accuracy 2. Records wrist time Chronographer can work with your whole watch collection. Create a “card” for each watch, giving it a name and, optionally, a longer description. Select a picture from your Photos library and add additional notes, such as the watch’s specifications, purchase details, and service history. All information is stored in iCloud and automatically synchronized between your devices. To track a watch’s accuracy, periodically collect data points comparing its indicated time to the current correct time. Chronographer tracks offsets (the difference from the correct time) and daily rate (how many seconds it gains or loses per day). It uses this information to create graphs and histograms that help you visualize your watch’s performance over time. Chronographer also calculates the following metrics: * Average offset * Max. positive offset * Max. negative offset * Last offset * Net gain/loss * Best-fit rate * Average rate * Fastest rate * Slowest rate * Last rate * Rate variance * Best-fit rate drift You can log the watch (or watches) that you wear each day. Chronographer’s wrist time tracking feature lets you see which watches you wear the most and how long it’s been since you’ve worn each one. You can use Chronographer to identify positional variation. When you record a data point, include the position (dial up, crown up, etc.) that the watch was stored in. Then, you can restrict the charts and metrics to specific positions and compare the results. Chronographer includes a large digital clock to help when you set your watches. For more information, including a detailed user’s guide, see https://www.rmfrance.net/chronographer
Screenshots
Verdict
The clearest difference is review sentiment: Caline at 100% against Chronographer's 50%. Caline also leads on rating (5.0 vs 3.4) and update cadence (every 2 weeks vs every 2 months). Chronographer's advantage is price (Free vs $1.99). On ratings volume, 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
Chronographer is free to download; Caline costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Caline holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews point the same way: 100% of Caline's written reviews are positive against 50% of Chronographer's.
Caline ships an update every 2 weeks, Chronographer every 2 months. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.
| Parameter | Caline | Chronographer |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | 3.4 (5 ratings) |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuuichi Kuze | Robert France |
Customer experience
Caline
Chronographer
In-app purchases
Caline
No in-app purchases
Chronographer
No in-app purchases








