SensorLog vs AI limits
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SensorLog
Record and stream sensor data from your iPhone, iPad, and Apple Watch. Export data in CSV or JSON format, or send it via TCP, UDP, or HTTP requests. Integrates with Core ML models for advanced analysis.
- Log sensor data up to 100Hz
- Stream data via TCP/UDP or HTTP
- Export data as CSV or JSON
- Remote client/server functionality
- Siri and Shortcuts integration
- Core ML model support
- HealthKit data export from Apple Watch
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With SensorLog you can read sensor data from the iPhone, iPad and Apple Watch. The sensor data can be saved as a file in CSV or JSON format, streamed via TCP/UDP or sent as an HTTP request. The most important functions for iPhone and iPad: - Sensor data can be recorded at up to 100Hz (depending on the iOS device version and sensor type). - Sensor data can be streamed in server or client mode using TCP or UDP. Depending on the network speed and the server or client configuration used, this is possible with up to 100Hz. - Via HTTP(S) GET/POST request, sensor data in JSON format (POST) or form-url encoded (POST and GET) can be transmitted to a REST API with up to 20Hz. - With the SensorLog Remote Client/Server function, an iPad or iPhone can connect as a SensorLog Remote Client to an iPhone or iPad, which takes on the role of SensorLog Remote Server. The client's sensor data can be visualized on the server, and the server can control the clients (start/stop logging, start/stop sending data). - Logging can be started and stopped using Siri and shortcuts. - SensorLog supports Core ML models created with Apple's Create ML app. Log data with SensorLog, train a model with the data in Create ML, load exported models in SensorLog and log the model prediction. Supported Create ML models are: Activity Classifier, Tabular Regressor and Tabular Classifier. - If you have an Apple Watch, HealthKit data such as heart rate, energy used, sleep and movement data can be exported on the watch as a csv or json file and then transferred to your iPhone. Sensor data iPhone / iPad: For sample log files, please visit the SensorLog homepage (link App Support). - CLLocation, CLHeading, CMAccelerometer, CMGyroData, CMMagnetometer, CMDeviceMotion, CMActivity, CMPedometer, CMAltimeter, WLAN and network provider IP addresses, device orientation, battery info, decibels. The most important functions for Apple Watch: - Logging Option 1: Logging duration up to 1 hour Simultaneous logging of all selectable sensor data is supported in the background with up to 50Hz. Individual sensors can be logged with a higher frequency of up to 100Hz. Sending data via HTTP requests is supported. - Logging option 2: Logging duration greater than 1 hour In the background only logging of the accelerometer data with max. 50Hz is supported. In the foreground all sensor data with up to 100Hz. Sending data via HTTP requests is only supported when the app is in the foreground. - Via HTTP(S) GET/POST request, sensor data can be transmitted to a REST API with up to 10Hz in JSON format (POST) or form-url encoded (POST and GET). - The Health Store data feature off the SensorLog Watch app allows you to export HealthKit data like heart rate, energy burned, sleep, and movement data. This data is automatically recorded by your Watch and can be read out and exported by SensorLog as csv or json file and transferred to your iPhone. - Logging can be started and stopped using Siri and Shortcuts. Sensor Data Watch: For sample log files, please visit the SensorLog homepage (link App Support). - CLLocation, CMAccelerometer, CMDeviceMotion, CMActivity, CMPedometer, CMAltimeter, battery info
AI limits
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AI limits is for Claude, Gemini, ChatGPT (Codex limits), Kimi (Kimi Code) and Grok subscribers who want to know where they stand on their usage limits. Independent app, neither affiliated with nor endorsed by Anthropic, Google, OpenAI, Moonshot AI or xAI. "Claude" is a trademark of Anthropic; "Gemini" of Google LLC; ChatGPT and Codex of OpenAI; "Kimi" of Moonshot AI; "Grok" of xAI. FREE FOR 7 DAYS, THEN A ONE-TIME $1.99 PURCHASE The download is free, with every feature for 7 days from the download. After that, without a purchase, real readings, widgets, complications, notifications, Live Activities, Siri and the Apple Watch stop working, and adding an account is blocked. A single in-app purchase, "Full access", at $1.99 (equivalent price in your currency) restores them on iPhone, Mac and Apple Watch with the same Apple ID. No subscription, no Family Sharing. Demo mode stays free, with no time limit. The purchase can be restored in Settings. WHAT YOU SEE • One card per account: percentage used, ring, time left before reset; detail per window and a 7-day history. • When a limit is reached: a countdown to the resume time, then "You can resume". • A pace forecast: "at this pace, limit reached around 4:20 PM". WHEREVER YOU WANT IT • Widgets for the Home Screen, Lock Screen and StandBy. • Apple Watch: accounts, detail and complications. • Mac: window, widgets and menu bar. • Dynamic Island and Lock Screen: a resume counter when a limit is reached (resume within 8 hours). • Siri and Shortcuts: "Where do I stand with AI limits". NOTIFICATIONS • Alerts at 70, 90 and 100% and when a window resets, scheduled on your device, with no server. They depend on readings taken while the app runs (frequency decided by iOS). SYNC • iCloud option: your devices share the account list and the latest readings through your private iCloud, with no password, cookie or token. CHATGPT (CODEX LIMITS) • Add a ChatGPT account: Codex limits of your subscription (5-hour and weekly, percentage, resume time). A ChatGPT subscription that includes Codex is required; message limits are not tracked. • Tested with ChatGPT Plus; sign-in tested with email only. KIMI (KIMI CODE) • Add a Kimi account: the usage limits of Kimi (Kimi Code) for a Kimi subscription that includes them. Kimi Code API key as an advanced option. GROK • Add a Grok account: the usage limits of Grok for a subscription that includes them. Sign in on Grok's official page, no password stored. Widgets and Watch: for ChatGPT, Kimi and Grok, a reading when iOS allows, otherwise the app's latest reading. PRIVACY • No developer server, no analytics, no ads, no data collection. • You sign in on the official claude.ai, Google, chatgpt.com, Kimi or Grok page, in a window inside the app: it never sees your password. The Claude session goes in the keychain; Gemini's stays in web storage of the app; so do ChatGPT's, Kimi's and Grok's, plus their session cookies in the keychain, to read outside the app. • The app only contacts claude.ai, api.anthropic.com, Google services (gemini.google.com) and, if you add a ChatGPT, Kimi or Grok account, chatgpt.com, kimi.com / kimi.ai or grok.com with their sign-in pages (openai.com, x.ai, accounts.google.com, appleid.apple.com, challenges.cloudflare.com), from your device. • Deleting an account erases its credentials, web session and readings. DEMO MODE No account? Every feature (ChatGPT, Kimi and Grok included) with sample data, no sign-in. GOOD TO KNOW • If a service changes, the app shows a clear message rather than made-up figures until an update. • Google may refuse sign-in inside an embedded window; the app says so. • A paid subscription is required for real readings: Claude (Pro/Max), Gemini (Google AI Pro/Ultra), ChatGPT including Codex, Kimi including Kimi Code or Grok on a subscription that includes its limits.
Screenshots
Verdict
The clearest difference is price: AI limits at Free against SensorLog's $2.99. AI limits also leads on update cadence (every 3 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement 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
AI limits is free to download; SensorLog costs $2.99 up front. SensorLog sells 4 one-off in-app purchases and AI limits sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
SensorLog ships an update every 2 months, AI limits every 3 days. Both last shipped on November 13, 2026.
| Parameter | SensorLog | AI limits |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.4 (41 ratings) — better | — |
| Positive reviews | 69.0% of reviews | — |
| Number of ratings | 41 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, Mac, Apple Watch |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 4 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Bernd Thomas | CAPCOD |
In-app purchases
SensorLog
- Buy me a Coffee ...$0.99
- Spend me an Ice Cream ...$1.99
- Offer me a glas of Wine ...$5.99
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- Invite me for a Cocktail ...$9.99
AI limits
- Full unlock$1.99









