# CellLog: LiPo Battery Tracker — Cycle count, IR, retire signal

> Cycle count, IR, retire signal (iPhone/iPad app by Yoshifumi Sato.)

- Source: https://appshunter.io/ios/app/celllog-lipo-battery-tracker/id6793566288 (this page in markdown: same URL + `.md`)
- Developer: [Yoshifumi Sato](https://appshunter.io/developer/6780413827)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, Japanese
- Released: 2026-08-04
- Data updated: 2026-08-21
- User reviews in markdown: https://appshunter.io/ios/app/celllog-lipo-battery-tracker/id6793566288/reviews.md

## What is CellLog?

CellLog is a per-pack logbook for LiPo, LiHV and Li-ion batteries. Track every pack you own — cycles, internal resistance, swelling and storage voltage — and retire packs on data, not guesswork.

MADE FOR RC, FPV, DRONE & AIRSOFT
Whether you fly quads, planes and helis, drive RC cars or run airsoft AEGs, your packs age with every charge. CellLog keeps one clean record per battery, so you always know which pack is fresh and which is on its way out.

BATTERY REGISTRY
- Register each pack: chemistry (LiPo / LiHV / Li-ion), cell count, capacity, C-rating, purchase date, baseline IR
- See your whole fleet at a glance with health badges: Healthy, Watch, Retire

CYCLE COUNTER
- Tap "+1 Cycle" after each charge - that is all it takes
- A cycle gauge fills toward your retirement limit, one colored block per log

HEALTH CHECKS
- Log internal resistance per cell, swelling and storage voltage
- IR trend chart shows rising resistance before the pack lets you down

RETIRE SIGNAL
- Set your own rules: cycle limit and IR rise limit
- CellLog flags packs to watch and packs to retire - with the numbers to back it up

NFC TAGS
- Stick an NFC tag on a battery, link it once, then tap to open that pack instantly
- Write tags right from the app

YOUR DATA STAYS YOURS
- Everything is stored on your device - no account, no cloud, no tracking
- Export your full logbook to CSV anytime

CellLog is free to try with your first packs. One single purchase unlocks unlimited batteries, NFC tag writing, full-history charts and CSV export - forever, on all your devices.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| CellLog Pro | $9.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-04

No release notes.

## More apps by Yoshifumi Sato

- [おけいこ月謝帳 教室の集金管理](https://appshunter.io/ios/app/id6787108752)
- [DualShot: Front & Back Cam](https://appshunter.io/ios/app/dualshot-front-and-back-cam/id6788761561)
- [Progressly – Body Progress](https://appshunter.io/ios/app/progressly-body-progress/id6789591055)
- [Holdly – Isometric Timer](https://appshunter.io/ios/app/holdly-isometric-timer/id6789790139)
- [かんじ1年生 小学1年の漢字ドリル](https://appshunter.io/ios/app/1-1/id6789917332)
- [かんじ3年生 小学3年の漢字ドリル](https://appshunter.io/ios/app/3-3/id6790055787)

All apps by Yoshifumi Sato: https://appshunter.io/developer/6780413827

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*