JamTimer - for roller derby

Name: JamTimer - for roller derby
Rating: 5.0 (9 reviews)
Author: Fearless Code

by Fearless Code

iPhone

Abandoned risk Last checked 31 Jul 2026

App Store ↗

Quick verdict

What it is: Store information collected; independent summary not yet available.
At a glance: $1.99

Categories and search queries

Official categories

Sports
Lifestyle

AppCorpus categories

Key functions

Function	Availability	Access	Scope	Evidence
Family Sharing	Yes	Unknown	App Store	Store published

Screens

App Store

4 store screenshots

Pricing & paywalls

App Store

Price: $1.99

Last verified 31 Jul 2026

Ratings & reviews

App Store

5.0 9 ratings · App Store

5/5Add to Apple Watch?
I love this app, makes jam timing so easy! Any chance it will make it onto Apple Watch?

Keenysmom · 31 Jul 2026
5/5The best!
I love this app! So much better then having to fumble with 2 stop watches.

Ma Guns · 31 Jul 2026
5/5Amazing
Exactly what a derby girl needs! And reasonably priced too :) this is a great app

CrashBandahoot · 31 Jul 2026
5/5Jam Timer
I am no longer juggling stop watches, praying I will push the right button in the right order. This app made easy work of my job. I highly recommend this app for anyone who has the pleasure of jam timing. It is the best app I ever bought. Thank you!!!!

Drbysk8ter · 31 Jul 2026
5/5Must have app for derby
Love, love, love this app. I use it during practice as well as bouts. Makes timekeeping easy, anyone who can use an iPhone can timekeep.

Miso Nasty · 31 Jul 2026

Privacy & accessibility

App Store

Privacy

No Details Provided Developer declared

Accessibility

No accessibility labels collected yet.

Versions

App Store

1.0
2.0
New in 2.0: ✓ Support for the iPhone 5 and iPod touch 5th gen screen sizes. ✓ Added game configurations for RDCL and OSDA. ✓ Added support for game configurations of 6 and 8 periods. ✓ The length of the last jam will show during a jam break. ✓ Simplified game configuration editing. ✓ A beautiful new app icon and general user interface improvements. ✓ Full support for iOS 6 app state restoration. ✓ Full accessibility support for vision impaired users. ✓ Lots of architectural improvements under the hood.
2.0.1
New in 2.0.1: ✓ Minor fixes and improvements. New in 2.0: ✓ Support for the iPhone 5 and iPod touch 5th gen screen sizes. ✓ Added game configurations for RDCL and OSDA. ✓ Added support for game configurations of 6 and 8 periods. ✓ The length of the last jam will show during a jam break. ✓ Simplified game configuration editing. ✓ A beautiful new app icon and general user interface improvements. ✓ Full support for iOS 6 app state restoration. ✓ Full accessibility support for vision impaired users. ✓ Lots of architectural improvements under the hood.
2.0.2
- Fixed a bug with the 5-sec warning vibrate setting (thanks to Earl Slick). - Updated 'About' view contents.
3.0
• Added support for a countdown before the start of a period. The countdown defaults to 30-seconds, but you can start the jam at anytime. • Displays jam number and length for the previous jam. • Auto-start setting now defaults to ON. • Improved options for sending feedback or sharing with friends. • Performance improvements. • Complete refresh for iOS 7. App Store reviews are very helpful to us. If you think JamTimer is worthy, please take a moment to write a nice review. Thank you for supporting JamTimer!
3.0.1
• Stabilization and minor bug fixes. App Store reviews are very helpful to us. If you think JamTimer is worthy, please take a moment to write a nice review. Thank you for supporting JamTimer!
4.0
• Added support for current device screen sizes. • Visual refresh and new icons. App Store reviews are very helpful. If you think JamTimer is worthy, please take a moment to write a review. Thank you for supporting JamTimer!
4.0.1
• Fixed home screen icon when installed on an iPad. App Store reviews are very helpful. If you think JamTimer is worthy, please take a moment to write a review. Thank you for supporting JamTimer!
4.1
• Updated for iOS 11 and the iPhone X. App Store reviews are very helpful. If you think JamTimer is worthy, please take a moment to write a review. Thank you for supporting JamTimer!
4.2
• Updates for compatibility with iOS 13. • Support for all current iPhone and iPad device sizes. • Added support for dark mode.
4.2.1 · 24 Aug 2020
• Minor fixes and improvements.

Show more Show less

Alternatives

Byga — Same category + similar ratings

Availability by market

Data quality & evidence

Page completeness: Live store listing
Last verified: 31 Jul 2026
Sources: App Store

Independent summary has not been published yet.

Report a correction

Use this page with an AI agent

AppCorpus MCP gives your agent current app data, prices, screens, features and sources.

Example prompt

Compare JamTimer - for roller derby with Byga.

View JSON

GET /api/v3/apps/435346062

{
  "app_id": 435346062,
  "canonical_url": "https://appcorpus.com/apps/jamtimer-for-roller-derby-435346062",
  "identity": {
    "name": "JamTimer - for roller derby",
    "slug": "jamtimer-for-roller-derby",
    "developer": {
      "name": "Fearless Code",
      "url": "https://appcorpus.com/developers/fearless-code-developer_ded4f23a7fb3ff2050e79612692f9898"
    },
    "icon_url": "https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/52/05/c9/5205c9d0-762d-9a24-753f-de5d1cf9e877/AppIcon-1x_U007emarketing-0-7-0-85-220.png/512x512bb.jpg",
    "stores": [
      "apple"
    ],
    "platforms": [
      "iphone"
    ],
    "status": {
      "state": "abandoned-risk",
      "label": "Abandoned risk",
      "last_checked": "2026-07-31",
      "last_checked_label": "31 Jul 2026",
      "banner": null,
      "region_note": null
    }
  },
  "listings": [
    {
      "store": "apple",
      "status": "ACTIVE",
      "url": "https://apps.apple.com/us/app/jamtimer-for-roller-derby/id435346062?uo=4",
      "rating": 5.0,
      "rating_count": 9,
      "formatted_price": "$1.99",
      "is_free": false,
      "has_iap": false,
      "has_subscription": false,
      "version": "4.2.1",
      "updated": "2020-08-24",
      "currency": "USD"
    }
  ],
  "summary": {
    "one_liner": null,
    "summary": null,
    "best_for": [],
    "not_for": [],
    "status": "fallback",
    "at_a_glance": [
      "$1.99"
    ]
  },
  "categories": {
    "official": [
      "Sports",
      "Lifestyle"
    ],
    "appcorpus": [
      {
        "category_id": "sports",
        "label": "Sports",
        "url": "https://appcorpus.com/categories/sports"
      },
      {
        "category_id": "lifestyle",
        "label": "Lifestyle",
        "url": "https://appcorpus.com/categories/lifestyle"
      }
    ]
  },
  "use_cases": [],
  "features": [
    {
      "capability_id": "family_sharing",
      "label": "Family Sharing",
      "availability": "yes",
      "access_level": "unknown",
      "scope": "App Store",
      "evidence": "Store published"
    }
  ],
  "pricing": [
    {
      "store": "apple",
      "formatted_price": "$1.99",
      "is_free": false,
      "has_iap": false,
      "has_subscription": false,
      "currency": "USD",
      "market": "us",
      "last_verified": "2026-07-31",
      "rows": [
        "Price: $1.99"
      ]
    }
  ],
  "screens": [
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/3d/3f/2f/3d3f2fcf-ecd0-c7b9-195b-8c6c6d2e339b/cf09beb5-e584-4828-bd34-a16a136c6f3e_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2020-08-11_at_22.32.30.png/1242x1600bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "JamTimer - for roller derby iphone screenshot 1"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/30/09/c8/3009c81d-8110-9f56-924e-89afdbe974be/9a54f4da-c5f0-4f4f-9b32-f8d3d68e1f1f_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2020-08-11_at_22.32.49.png/1242x1600bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "JamTimer - for roller derby iphone screenshot 2"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/bf/8b/d0/bf8bd03e-4644-8966-6c1b-cdfd4d07f61c/3838f82b-4de1-49ac-a772-0ea8e17403cd_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2020-08-11_at_22.32.04.png/1242x1600bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "JamTimer - for roller derby iphone screenshot 3"
    },
    {
      "url": "https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/c1/0c/1d/c10c1d01-6600-2691-162a-92108f30695c/9a558e7a-3f58-4921-9edf-baa97dc49696_Simulator_Screen_Shot_-_iPhone_11_Pro_Max_-_2020-08-11_at_22.32.09.png/1242x1600bb.jpg",
      "store": "apple",
      "platform": "iphone",
      "alt": "JamTimer - for roller derby iphone screenshot 4"
    }
  ],
  "ratings": [
    {
      "store": "apple",
      "average": 5.0,
      "count": 9,
      "market": "us",
      "observed_at": "2026-07-31",
      "reviews": [
        {
          "rating": 5,
          "title": "Add to Apple Watch?",
          "body": "I love this app, makes jam timing so easy! Any chance it will make it onto Apple Watch?",
          "author": "Keenysmom",
          "date": "31 Jul 2026"
        },
        {
          "rating": 5,
          "title": "The best!",
          "body": "I love this app! So much better then having to fumble with 2 stop watches.",
          "author": "Ma Guns",
          "date": "31 Jul 2026"
        },
        {
          "rating": 5,
          "title": "Amazing",
          "body": "Exactly what a derby girl needs! And reasonably priced too :) this is a great app",
          "author": "CrashBandahoot",
          "date": "31 Jul 2026"
        },
        {
          "rating": 5,
          "title": "Jam Timer",
          "body": "I am no longer juggling stop watches, praying I will push the right button in the right order. This app made easy work of my job. I highly recommend this app for anyone who has the pleasure of jam timing. It is the best app I ever bought. Thank you!!!!",
          "author": "Drbysk8ter",
          "date": "31 Jul 2026"
        },
        {
          "rating": 5,
          "title": "Must have app for derby",
          "body": "Love, love, love this app. I use it during practice as well as bouts. Makes timekeeping easy, anyone who can use an iPhone can timekeep.",
          "author": "Miso Nasty",
          "date": "31 Jul 2026"
        }
      ]
    }
  ],
  "privacy": [
    {
      "store": "apple",
      "declarations": [
        {
          "title": "No Details Provided",
          "detail": "",
          "source": "Developer declared"
        }
      ],
      "accessibility": []
    }
  ],
  "changes": [
    {
      "store": "apple",
      "version": "1.0",
      "released_at": null,
      "notes": ""
    },
    {
      "store": "apple",
      "version": "2.0",
      "released_at": null,
      "notes": "New in 2.0: ✓ Support for the iPhone 5 and iPod touch 5th gen screen sizes. ✓ Added game configurations for RDCL and OSDA. ✓ Added support for game configurations of 6 and 8 periods. ✓ The length of the last jam will show during a jam break. ✓ Simplified game configuration editing. ✓ A beautiful new app icon and general user interface improvements. ✓ Full support for iOS 6 app state restoration. ✓ Full accessibility support for vision impaired users. ✓ Lots of architectural improvements under the hood."
    },
    {
      "store": "apple",
      "version": "2.0.1",
      "released_at": null,
      "notes": "New in 2.0.1: ✓ Minor fixes and improvements. New in 2.0: ✓ Support for the iPhone 5 and iPod touch 5th gen screen sizes. ✓ Added game configurations for RDCL and OSDA. ✓ Added support for game configurations of 6 and 8 periods. ✓ The length of the last jam will show during a jam break. ✓ Simplified game configuration editing. ✓ A beautiful new app icon and general user interface improvements. ✓ Full support for iOS 6 app state restoration. ✓ Full accessibility support for vision impaired users. ✓ Lots of architectural improvements under the hood."
    },
    {
      "store": "apple",
      "version": "2.0.2",
      "released_at": null,
      "notes": "- Fixed a bug with the 5-sec warning vibrate setting (thanks to Earl Slick). - Updated 'About' view contents."
    },
    {
      "store": "apple",
      "version": "3.0",
      "released_at": null,
      "notes": "• Added support for a countdown before the start of a period. The countdown defaults to 30-seconds, but you can start the jam at anytime. • Displays jam number and length for the previous jam. • Auto-start setting now defaults to ON. • Improved options for sending feedback or sharing with friends. • Performance improvements. • Complete refresh for iOS 7. App Store reviews are very helpful to us. If you think JamTimer is worthy, please take a moment to write a nice review. Thank you for supporting JamTimer!"
    },
    {
      "store": "apple",
      "version": "3.0.1",
      "released_at": null,
      "notes": "• Stabilization and minor bug fixes. App Store reviews are very helpful to us. If you think JamTimer is worthy, please take a moment to write a nice review. Thank you for supporting JamTimer!"
    },
    {
      "store": "apple",
      "version": "4.0",
      "released_at": null,
      "notes": "• Added support for current device screen sizes. • Visual refresh and new icons. App Store reviews are very helpful. If you think JamTimer is worthy, please take a moment to write a review. Thank you for supporting JamTimer!"
    },
    {
      "store": "apple",
      "version": "4.0.1",
      "released_at": null,
      "notes": "• Fixed home screen icon when installed on an iPad. App Store reviews are very helpful. If you think JamTimer is worthy, please take a moment to write a review. Thank you for supporting JamTimer!"
    },
    {
      "store": "apple",
      "version": "4.1",
      "released_at": null,
      "notes": "• Updated for iOS 11 and the iPhone X. App Store reviews are very helpful. If you think JamTimer is worthy, please take a moment to write a review. Thank you for supporting JamTimer!"
    },
    {
      "store": "apple",
      "version": "4.2",
      "released_at": null,
      "notes": "• Updates for compatibility with iOS 13. • Support for all current iPhone and iPad device sizes. • Added support for dark mode."
    },
    {
      "store": "apple",
      "version": "4.2.1",
      "released_at": "2020-08-24",
      "notes": "• Minor fixes and improvements."
    }
  ],
  "alternatives": [
    {
      "app_id": 1416710083,
      "name": "Byga",
      "url": "https://appcorpus.com/apps/byga-1416710083",
      "reason": "Same category + similar ratings"
    }
  ],
  "evidence_summary": {
    "index_state": "S1",
    "evidence_level": 1,
    "level_label": "Live store listing",
    "indexable": true,
    "last_verified_at": "2026-07-31",
    "unknown_fields": [
      "Independent summary has not been published yet."
    ],
    "sources": [
      "App Store"
    ]
  },
  "availability_markets": {
    "live": [
      "us"
    ],
    "selected": "us",
    "note": null
  },
  "feature_events": {
    "events": []
  },
  "features_slice": {
    "plans": [],
    "features": [],
    "unknown_features": [
      "family_sharing"
    ],
    "data_cutoff": "31 Jul 2026"
  }
}